🩺 Connective Tissue Disorders in Pregnancy

Taught Like a Story - Based on Williams Obstetrics 26e / Creasy & Resnik's Maternal-Fetal Medicine

🎬 THE STORY BEGINS: "The Rebellious Immune System vs. The Pregnant Body"

🌟 CHARACTER 1: SYSTEMIC LUPUS ERYTHEMATOSUS (SLE)

The Origin Story

• Women of reproductive age (this is WHY it matters so much in OB)
• Prevalence: 5-100 per 100,000 women in the USA
• 2-4x more common in Black Americans than White Americans - remember this for MCQs
• Female:Male ratio ~9:1 (sex hormones play a permissive role)

How the Fire Starts (Pathogenesis)

1. Genetic susceptibility - dozens of loci involved (MHC, complement, immunomodulatory pathways). Concordance in monozygotic twins = 25-50%, dizygotic = 2-5%
2. Environmental trigger (infections, UV light, drugs) ignites the fire
3. Loss of self-tolerance - defective clearance of immune complexes and apoptotic cells creates an inflammatory milieu. Aberrant type I interferons are the gasoline

• ANA (antinuclear antibodies) - the screening test (positive in >95%)
• Anti-dsDNA - present in >75% of newly diagnosed SLE; rising levels = flare incoming (most specific)
• Anti-Sm - most specific for SLE
• Anti-Ro/SSA and Anti-La/SSB - cause neonatal lupus and congenital heart block
• Antiphospholipid antibodies - cause thrombosis and pregnancy loss

Diagnosis (ACR/EULAR 2019 Criteria)

• Constitutional (fever)
• Hematologic
• Neuropsychiatric
• Mucocutaneous (malar rash, discoid rash, photosensitivity, oral ulcers)
• Serosal (pleuritis, pericarditis)
• Musculoskeletal (arthritis)
• Renal (nephritis - most serious)

• Antiphospholipid antibodies
• Complement proteins (low C3/C4)
• SLE-specific antibodies (anti-dsDNA, anti-Sm)

SLE in Pregnancy - The Battle Royale

• Disease was active within 6 months of conception
• Patient has lupus nephritis
• Not on hydroxychloroquine (HCQ)

• Cesarean delivery: RR 1.85
• Hypertension: RR 1.99
• Preeclampsia: RR 1.91
• Spontaneous abortion: RR 1.51
• Thromboembolic disease: RR 11.29 (massive - remember this!)
• Postpartum infection: RR 4.35
• Maternal mortality: 20-fold higher than general obstetric population (now improved to ~2-fold with modern care)

Fetal Risks

• Intrauterine growth restriction (IUGR)
• Preterm birth
• Stillbirth
• Neonatal lupus - caused by transplacental passage of maternal anti-Ro/SSA ± anti-La/SSB antibodies
  • Skin rash (resolves after ~6 months as maternal antibodies clear)
  • Liver disease (transient)
  • Congenital heart block (CHB) - the most feared complication. Third-degree CHB = permanent, may need pacemaker. Risk = ~2% if mother has anti-Ro; increases to ~15-17% if previous child had CHB

Treatment in Pregnancy

• Hydroxychloroquine (HCQ) - CONTINUE throughout pregnancy; reduces flares, reduces risk of CHB, reduces preterm birth. This is the cornerstone drug
• Low-dose aspirin (for preeclampsia prevention)
• Prednisone/prednisolone (limited transplacental passage - placenta metabolizes it)
• Azathioprine (safe; monitor for myelosuppression)
• Cyclosporine, Tacrolimus (safe with dose adjustment - clearance increases in pregnancy, may need 40% dose increase)
• IV immunoglobulin

• Methotrexate - teratogenic, stop >3 months before conception
• Mycophenolate mofetil (MMF) - teratogenic (ear deformity/microtia, cleft lip, diaphragmatic hernia, shortened fingers). Stop at least 6 weeks before conception
• Cyclophosphamide - teratogenic; use only in life-threatening disease after first trimester
• Sirolimus - stop before conception

• Ideally, SLE should be in remission for at least 6 months before conception
• Check anti-Ro/SSA, anti-La/SSB, antiphospholipid antibodies before pregnancy
• Absolute contraindications to pregnancy: severe PAH, severe cardiomyopathy, significant renal insufficiency

🌟 CHARACTER 2: ANTIPHOSPHOLIPID SYNDROME (APS)

The Story

1. Lupus anticoagulant (LAC/LA) - measured by clotting assay (paradoxically PROLONGS clotting time in lab but causes CLOTS in vivo - classic exam trick!)
2. Anticardiolipin antibodies (aCL) - IgG or IgM; threshold = >40 GPL or MPL units (medium-high titer)
3. Anti-β2-glycoprotein-I antibodies (anti-β2GP1) - IgG or IgM; threshold = >99th percentile

Classification Criteria (Sapporo/Sydney Criteria - Updated)

1. Vascular thrombosis - arterial, venous, or small vessel (in any tissue/organ)
2. Pregnancy morbidity:
   • ≥1 unexplained fetal death at ≥10 weeks (normal morphology)
   • ≥1 premature birth at <34 weeks due to eclampsia, severe preeclampsia, or placental insufficiency
   • ≥3 consecutive unexplained pregnancy losses at <10 weeks

• Lupus anticoagulant
• aCL antibody (IgG or IgM, medium-high titer)
• Anti-β2GP-I antibody (IgG or IgM, >99th percentile)

The "Triple Positive" Nightmare

Pregnancy Management in APS

• Low-dose aspirin (LDA) + prophylactic or low-dose heparin (LMWH/UFH)
• This combination reduces pregnancy loss significantly

• LDA + therapeutic anticoagulation (LMWH or UFH)
• Continue anticoagulation postpartum (high risk period for thrombosis)

🌟 CHARACTER 3: MARFAN SYNDROME

The Story

• Tall stature, arachnodactyly, joint hypermobility
• Ectopia lentis (lens dislocation)
• Cardiovascular: aortic root dilatation, MVP, aortic regurgitation (80% of patients)
• If untreated, life expectancy reduced by HALF, mainly due to aortic dissection

Why Pregnancy is Dangerous in Marfan

• Increased blood volume and cardiac output (up 40-50%)
• Increased aortic wall stress
• Hormonal changes (relaxin, progesterone) further weaken connective tissue

The Aortic Root Decision Tree

• Aortic root ≥45 mm = avoid pregnancy, recommend elective surgical repair first
• ACC/AHA/AATS guidelines suggest repair if >40 mm in women contemplating pregnancy (lower threshold!)

• Aortic root <40 mm = ~1% risk of dissection
• Aortic root >40 mm = ~4-6% risk of dissection

Management During Pregnancy

• Beta-blocker throughout pregnancy (long-acting preferred) - reduces pulsatile forces on aortic wall
• Multidisciplinary team: MFM + geneticist + cardiovascular surgeon
• Serial echocardiography every trimester + postpartum
• Mode of delivery: if aortic root is significantly dilated, cesarean delivery preferred to avoid Valsalva forces of labor
• Avoid vaginal delivery if aortic root >45 mm

Loeys-Dietz & Vascular Ehlers-Danlos Syndrome

• Loeys-Dietz syndrome and vascular Ehlers-Danlos syndrome = highest risk of aortic dissection at ANY aortic root size
• These women may be counseled against pregnancy regardless of aortic dimensions
• Vascular EDS: caused by COL3A1 mutation (type III collagen defect)
• Risk of uterine rupture during labor in vascular EDS!

🌟 CHARACTER 4: SYSTEMIC SCLEROSIS (SCLERODERMA)

The Story

• Skin involvement limited to hands, face, feet, forearms
• CREST syndrome: Calcinosis, Raynaud's, Esophageal dysmotility, Sclerodactyly, Telangiectasia
• Anti-centromere antibodies
• Better prognosis

• Widespread skin and visceral involvement
• Anti-topoisomerase I (anti-Scl-70) antibodies
• Renal crisis (the killer), ILD, PAH
• Worse prognosis

SSc in Pregnancy

• Fertility generally preserved
• Pregnancies with limited SSc do relatively well
• Diffuse SSc with renal involvement or PAH = major risks
• Scleroderma renal crisis (hypertension + renal failure) can mimic preeclampsia - treatment is ACE inhibitors (normally contraindicated in pregnancy, but here it may be life-saving for the mother)
• Preterm birth and IUGR are increased
• Raynaud's often improves in pregnancy (vasodilatory effect of pregnancy hormones)

🌟 CHARACTER 5: INFLAMMATORY MYOPATHIES

Polymyositis (PM) and Dermatomyositis (DM)

• PM: proximal muscle weakness, elevated CK, EMG changes, muscle biopsy
• DM: same + skin findings (heliotrope rash over eyelids, Gottron's papules over knuckles)
• Anti-Jo-1 antibodies = antisynthetase syndrome (ILD + myositis + mechanic's hands)

• Rare; outcome depends on disease activity at conception
• Active disease at conception = poor outcomes (spontaneous abortion, stillbirth, preterm birth)
• Disease in remission at conception = relatively good outcomes
• Treatment: corticosteroids; azathioprine as steroid-sparer (safe in pregnancy)
• DM in pregnancy: Screen for underlying malignancy (paraneoplastic DM)

🌟 CHARACTER 6: SJÖGREN'S SYNDROME

The Story

• Anti-Ro/SSA and Anti-La/SSB (same antibodies as SLE - bridge between the two!)

Sjögren's in Pregnancy - The Big Deal

• The primary pregnancy concern: maternal anti-Ro/SSA antibodies crossing the placenta = neonatal lupus and congenital heart block
• Same risk as with SLE: CHB risk ~2% if anti-Ro positive, ~15-17% if prior affected child
• Fetal cardiac surveillance: echocardiogram screening from 16-28 weeks in anti-Ro-positive mothers (most sensitive period for CHB development)
• Hydroxychloroquine may reduce CHB risk in anti-Ro-positive mothers

🌟 CHARACTER 7: RHEUMATOID ARTHRITIS (RA)

The Story

RA and Pregnancy - The Good News

• HCQ and sulfasalazine - safe throughout pregnancy
• Low-dose prednisone - safe
• TNF inhibitors (etanercept, adalimumab) - can be used in first two trimesters; generally stopped in third trimester to limit neonatal immunosuppression. Certolizumab pegol has minimal transplacental transfer (no Fc region) - preferred TNF inhibitor in pregnancy
• Methotrexate - STOP at least 3 months before conception (teratogenic)
• Leflunomide - STOP before conception; requires cholestyramine washout

💊 DRUG SUMMARY TABLE FOR ALL CTDs IN PREGNANCY

🌟 NEONATAL LUPUS - A Special Chapter Within the Story

Cast of Characters

• SLE mothers
• Sjögren's syndrome mothers
• Sometimes in asymptomatic mothers (mother may be anti-Ro positive but have no diagnosis!)

Clinical Manifestations in Neonate

1. Skin rash - annular, photosensitive; appears in first weeks; resolves spontaneously by 6 months (when maternal antibodies clear)
2. Hepatobiliary - transient hepatitis, cholestasis; usually resolves
3. Hematologic - thrombocytopenia, anemia; transient
4. Congenital Heart Block (CHB) - the irreversible one:
   • Third-degree CHB = complete AV dissociation; may need permanent pacemaker
   • Risk: 2% per pregnancy if anti-Ro positive
   • Risk rises to 15-17% if prior child had CHB
   • Screening: fetal echocardiography 16-28 weeks (peak risk window)
   • Treatment if CHB detected: dexamethasone/betamethasone (fluorinated steroids that cross placenta) - used for 2nd degree CHB to try to prevent progression; limited evidence
   • HCQ taken by mother throughout pregnancy may reduce CHB risk

🧠 HIGH-YIELD MCQs

📌 QUICK MEMORY TRICKS

📋 CONNECTIVE TISSUE DISORDERS IN PREGNANCY

Quick Summary (Williams Obstetrics Style)

1. SYSTEMIC LUPUS ERYTHEMATOSUS (SLE)

• Affects women of reproductive age; prevalence 5-100/100,000 in USA
• 2-4x more common in Black Americans
• F:M ratio = 9:1

• Loss of immune tolerance → autoantibody production
• Type I interferons are key mediators
• Concordance: MZ twins 25-50%, DZ twins 2-5%

• Must have: ANA positive + cumulative score >10 points with ≥1 clinical criterion

• Cesarean: RR 1.85
• Preeclampsia: RR 1.91
• Spontaneous abortion: RR 1.51
• Thromboembolic disease: RR 11.29 (most dramatic - remember!)
• Maternal mortality: 20x higher (now ~2x with modern care)
• Active renal disease = highest mortality risk

• IUGR, preterm birth, stillbirth
• Neonatal lupus (anti-Ro/SSA)
• Congenital Heart Block (CHB)

• Caused by: anti-Ro/SSA ± anti-La/SSB crossing placenta
• Skin rash → resolves by 6 months
• CHB (3rd degree) → permanent; may need pacemaker
• CHB risk: 2% if anti-Ro positive; 15-17% if prior child had CHB
• Screen: fetal echo at 16-28 weeks
• HCQ may reduce CHB risk

• Severe PAH
• Significant cardiomyopathy
• Moderate-severe renal insufficiency
• Plan pregnancy when in remission ≥6 months

• ✅ SAFE: HCQ (never stop!), azathioprine, prednisolone, cyclosporine, tacrolimus, IVIG, certolizumab
• ❌ STOP: Methotrexate (3 months before), MMF (6 weeks before), cyclophosphamide (1st trimester), sirolimus

2. ANTIPHOSPHOLIPID SYNDROME (APS)

• Primary APS (stands alone)
• Secondary APS (with SLE or other CTD)

1. Lupus anticoagulant (LAC) - most thrombogenic; paradoxically prolongs PTT in vitro but causes CLOTS in vivo
2. Anticardiolipin (aCL) - IgG/IgM; threshold >40 GPL/MPL units
3. Anti-β2-glycoprotein-I - IgG/IgM; threshold >99th percentile

• IgA subclass = NOT diagnostic

• Vascular thrombosis (any vessel)
• Pregnancy morbidity:
  • ≥1 fetal death ≥10 weeks (normal morphology)
  • ≥1 preterm birth <34 weeks (preeclampsia/placental insufficiency)
  • ≥3 consecutive losses <10 weeks

• LAC, aCL (IgG/IgM), anti-β2GP1 (IgG/IgM)

• Category I (triple positive) = highest risk for thrombosis and pregnancy loss

• Obstetric APS (no prior thrombosis): LDA + prophylactic LMWH
• APS with prior thrombosis: LDA + therapeutic LMWH (continue postpartum)
• Catastrophic APS (CAPS): anticoagulation + steroids + IVIG ± plasmapheresis; mortality ~50%

3. MARFAN SYNDROME

• Peak time for aortic dissection and rupture
• 50% risk of transmission to offspring

• ACC/AHA/AATS: consider repair if >40 mm in women considering pregnancy

• Beta-blocker throughout (reduces pulsatile forces)
• Serial echo every trimester + postpartum
• C-section if aortic root significantly dilated

4. SYSTEMIC SCLEROSIS (SCLERODERMA)

• Raynaud's often improves in pregnancy
• Scleroderma renal crisis can mimic preeclampsia; treat with ACE inhibitor (exception to the rule)
• PAH/renal involvement = poor prognosis

5. INFLAMMATORY MYOPATHIES

• Polymyositis (PM): Proximal weakness, high CK, no skin changes
• Dermatomyositis (DM): PM + heliotrope rash + Gottron's papules; screen for malignancy
• Anti-Jo-1: Antisynthetase syndrome (ILD + myositis + mechanic's hands)
• Active disease at conception = poor outcomes
• Treatment: corticosteroids + azathioprine

6. SJÖGREN'S SYNDROME

• Dry eyes + dry mouth (sicca)
• Antibodies: Anti-Ro/SSA + Anti-La/SSB (same as SLE)
• Pregnancy: risk of neonatal lupus + CHB via transplacental antibody transfer
• Manage same as anti-Ro positive SLE

7. RHEUMATOID ARTHRITIS

• Improves in ~75% of pregnancies (Th2 shift suppresses Th1-driven disease)
• Postpartum flares common (immune shift reverses)
• Safe drugs: HCQ, sulfasalazine (+ folic acid), low-dose prednisone, certolizumab
• Stop: Methotrexate (3 months before), Leflunomide (cholestyramine washout required)
• TNF inhibitors: generally safe up to 3rd trimester

🧠 20 HIGH-YIELD MCQs

📌 LAST-MINUTE RAPID REVISION TABLE

Note: The PDF you uploaded is a fully image-based file - I couldn't extract the text from it. If you can share the slide content as a PowerPoint/editable file, or type out any specific slides, I can tailor the MCQs exactly to your professor's material. But this summary covers the complete Williams OB chapter thoroughly!

📋 INFECTIONS IN PREGNANCY

Summary + High-Yield MCQs

PART 1: GENERAL PRINCIPLES

• Pregnancy does NOT alter resistance to infection
• Severe infections have greater effects on the fetus
• Maternal IgG crosses the placenta = passive immunity to fetus
• Fetal cell-mediated and humoral immunity develop by 9-15 weeks
• Primary fetal response to infection: IgM
• IgG transfer: increases rapidly at 16 weeks; fetal concentrations = maternal at 26 weeks
• WHO: exclusive breastfeeding for first 6 months

• Placenta (transplacental)
• During labor and delivery
• Breastfeeding

• PROM, Prolonged labor, Obstetrical manipulations

PART 2: VIRAL INFECTIONS

🔵 VARICELLA-ZOSTER VIRUS (VZV)

• Double-stranded DNA herpesvirus
• Highly infectious; spread by direct contact / air droplets
• Contagious 1-2 days BEFORE rash until all blisters form scabs
• Incubation period: 10-21 days
• Primary infection = chickenpox; Reactivation = herpes zoster (shingles)

• Congenital Varicella Syndrome (if infected <20 weeks): limb hypoplasia, skin scarring, eye defects, brain damage
• Neonatal Varicella (if maternal rash 5 days before to 2 days after delivery): SEVERE, up to 30% mortality

• VZIG (Varicella-Zoster Immune Globulin) - within 96 hours of exposure; approved up to 10 days to prevent/attenuate infection
• Acyclovir: 800 mg orally 5x/day for 5-7 days
• Valacyclovir: 1000 mg orally 3x/day for 7 days
• Acyclovir: Category B drug (USFDA); give in 2nd and 3rd trimesters

• Attenuated live-virus; 2 doses, 4-8 weeks apart
• NOT recommended for pregnant women or those planning pregnancy within 1 month of vaccine
• Vaccine NOT secreted in breast milk

🔵 RUBELLA (German Measles)

• Single-stranded RNA virus, Togavirus family
• Spread by nasopharyngeal secretions; transmission rate 80% in susceptible individuals
• Incubation period: 12-23 days
• Virus present in nasopharynx 1 week before symptoms
• Viremia precedes clinical signs by ~1 week
• Remains infectious through 5-7 days of rash

• Mild febrile illness with generalized maculopapular rash - starts on face, spreads to trunk and extremities

• IgM antibody: peaks 4-5 days after illness onset; persists up to 8 weeks
• IgG antibody: rises slower; peaks 1-2 weeks after rash; persists for life

• One of the most teratogenic agents known
• Worst during organogenesis
• 90% of fetuses affected if infection in first 12 weeks
• Classic triad: Cataracts + Congenital heart disease + Sensorineural deafness
• Also: microcephaly, mental retardation, growth restriction, hepatosplenomegaly

🔵 CYTOMEGALOVIRUS (CMV)

• Most common congenital viral infection worldwide
• Pregnancy does NOT increase risk or severity of maternal CMV infection
• Most maternal infections: asymptomatic
• 15% have mononucleosis-like syndrome: fever, pharyngitis, lymphadenopathy, polyarthritis

• Intrauterine / intrapartum
• Neonatal infection from breastfeeding
• Day-care centers

• Growth restriction
• Microcephaly
• Periventricular intracranial calcifications (vs. Toxo = periventricular diffuse)
• Chorioretinitis
• Mental and motor retardation
• Sensorineural defects (hearing loss - most common long-term sequela)
• Hepatosplenomegaly, jaundice

• Symptomatic treatment for maternal infection
• Amniocentesis for women with recent primary CMV
• IV Ganciclovir - for 6 weeks to neonates with symptomatic CNS disease
• Antiviral chemotherapy antepartum = NOT effective to prevent in utero transmission
• CMV-specific hyperimmune globulin - lowers risk of congenital CMV when given to pregnant women with primary disease
• No CMV vaccine available

PART 3: BACTERIAL INFECTIONS

🟡 GROUP B STREPTOCOCCUS (GBS) - Streptococcus agalactiae

• 20-25% of pregnant women carry GBS in GI tract and GUT
• Rarely serious in adults; life-threatening to newborns

• Preterm labor, PROM, chorioamnionitis, pyelonephritis, postpartum mastitis, puerperal infections

• Risk-based approach: preterm labor, PPROM, ROM ≥18 hours, previous sibling with GBS disease, intrapartum fever
• Culture-based approach: positive culture at 35-37 weeks; previous infant with invasive GBS
• Drug: Penicillin G (first-line); ampicillin (alternative); clindamycin or erythromycin for penicillin-allergic women

🟡 TUBERCULOSIS (TB) IN PREGNANCY

• Pregnancy does NOT increase susceptibility to TB or worsen disease
• Active TB in pregnancy: associated with preterm birth, IUGR, low birth weight

• First-line: Isoniazid (INH) + Rifampicin + Ethambutol (safe in pregnancy); add pyridoxine (Vitamin B6) with INH
• Streptomycin: AVOID in pregnancy (ototoxic to fetus)
• Pyrazinamide: limited data in pregnancy

🟡 SYPHILIS

• Uncommon before 18 weeks
• Fetal hepatic abnormalities → anemia → thrombocytopenia
• Ascites, hydrops, stillbirth
• Jaundice with petechiae, rhinitis (snuffles), pneumonia, myocarditis, nephrosis
• Placenta: large and pale; villi lose arborization, become thicker and clubbed; fewer blood vessels; spirochetes present

• Non-treponemal (screening): VDRL, RPR
• Treponemal (confirmatory): TPHA, FTA-ABS

PART 4: PARASITIC/PROTOZOAN INFECTIONS

🟢 TOXOPLASMOSIS

• Caused by Toxoplasma gondii (obligate intracellular protozoan)
• Sources: undercooked meat, cat feces, contaminated soil/water
• Most infections in immunocompetent: asymptomatic

• Anti-Toxoplasma IgG: develops 2-3 weeks after infection; peaks 1-2 months; persists for life
• IgM antibodies: appear by 10 days; becomes negative at 3-4 months; may remain detectable for years
• IgG positive alone (stable) = past infection → no risk for congenitally infected fetus

• Classic triad: Chorioretinitis + Intracranial (periventricular) calcifications + Hydrocephalus
• Also: rash, hepatosplenomegaly, ascites, fever, ventriculomegaly, mental retardation, seizures

1. Pyrimethamine 25 mg orally daily
2. Sulfadiazine 1 gram 2x daily for 28 days
3. Folinic acid 6 mg IM or orally 3x weekly

• Then half dose for additional 28 days

🟢 MALARIA

• Caused by Plasmodium spp. (falciparum, vivax, ovale, malariae, knowlesi)
• Transmitted by infected Anopheles mosquitoes
• Most common human parasitic disease
• In pregnancy: more atypical presentation
• Parasitemia 10x higher in pregnant women
• Mortality doubled in pregnancy (13%) vs. non-pregnant (6.5%)

• Stillbirth, preterm birth, IUGR, severe maternal anemia
• P. falciparum: early infection increases risk of abortion; may cause kidney failure, coma, death

PART 5: HIV IN PREGNANCY

• ~3 million HIV+ pregnant women give birth annually; 75% in sub-Saharan Africa
• 700,000 new childhood HIV infections/year

• 15-30% in untreated/undiagnosed mothers
• Without intervention, >80% of perinatal transmission occurs late in 3rd trimester, intrapartum, and through breastfeeding
• With appropriate measures: reduced to <1%

• Transmission >90% in HBeAg-positive women
• 40% transmission in HBeAg-negative women

• Plasma viral load, CD4 count, HIV genotype
• Hepatitis C screen, CBC, LFTs, RFTs
• Screening for genital infections (C. trachomatis, N. gonorrhoeae, BV, T. pallidum serology)
• Hemoglobinopathy screen

• Minimize materno-fetal transmission without increasing maternal or neonatal morbidity
• Multidisciplinary team: HIV physician, OB, Pediatrics, Social worker, voluntary support groups
• ART (antiretroviral therapy) for all HIV+ pregnant women regardless of CD4 count
• Elective cesarean section if viral load >1000 copies/mL at 36 weeks
• Avoid breastfeeding (if formula safe and affordable) OR use ART cover during breastfeeding

🧠 HIGH-YIELD MCQs (25 Questions)

📌 RAPID-FIRE FACT TABLE

CASE 1 - COMPLETE ANSWERS

Patient Summary

• 28-year-old, multigravida
• LMP: October 26-30, 2025 (use Oct 26 for Naegele's)
• Presenting with painful contractions x 8 hours + bloody show x 2 hours
• Cephalic presentation, IBOW on admission

1. EDC and AOG Today (July 28, 2026)

• October 26 → subtract 3 months → July 26 → add 7 days → August 2, 2026
• EDC = August 2, 2026

• From LMP Oct 26, 2025 to July 28, 2026
• Oct 26 → July 28 = 39 weeks and 2 days
• (Consistent with Ballard Score of 39 weeks at delivery)
• AOG = ~39 weeks 2 days

2. Bishop's Score on Admission & Interpretation

• Cervix dilated: 4 cm
• Effacement: 50%
• Station: -3
• Consistency: Soft
• Position: Mid

• Score ≥6 = favorable cervix for labor
• Score ≥8 = likelihood of successful vaginal delivery is similar to oxytocin induction
• This patient has a favorable cervix; labor is likely to progress well. No need for cervical ripening.

3. Problem at the 16th Hour & Management

• Active phase started at ~hour 14 (6 cm → 9 cm required more time)
• At hour 16: Fully dilated → entered 2nd stage, but at Station 0 - this represents protracted descent

1. Assess the cause - 3 P's: Power, Passenger, Passage
2. Check adequacy of contractions - at hour 16 contractions are good (240 MVUs at hour 12, continuing)
3. Amniotomy (if membranes still intact - RBOW at hour 12, so already ruptured)
4. Oxytocin augmentation if contractions are inadequate
5. Assess pelvis and fetal position (asynclitism, OP position)
6. Operative vaginal delivery (vacuum/forceps) if criteria met and no progress after adequate pushing
7. Cesarean section if vaginal delivery not safe

4. Hour of Labor When Patient Entered ACTIVE PHASE

• She was 4 cm on admission → active phase began at admission (Hour 0)

5. When Did She Enter PELVIC DIVISION & Abnormalities

• Normal: descent should progress at ≥1 cm/hour in second stage for multiparas
• Station was 0 at full dilation → +1 at 18 hours → delivery 30 min later
• This represents slow but eventually progressive descent
• (Handwritten note: "-20h" referring to the pelvic division at hour 20/around delivery time)

6. Ritgen's Maneuver

• With one hand: apply upward pressure on the fetal chin through the perineum (between the anus and coccyx) using a towel/drape
• With the other hand: apply downward pressure on the occiput (top of the baby's head)
• This extends the head and delivers it under control, between contractions

• Controls the rate and mechanism of head delivery (extension)
• Protects the perineum from uncontrolled lacerations
• Allows the smallest diameter of the fetal head to pass over the perineum

• Performed between contractions (original is done during contractions)
• More gentle; preferred in modern obstetrics

7. Median vs. Mediolateral Episiotomy

8. Signs of Placental Separation

9. Mechanism of Placental Separation

1. Schultze Mechanism (Central/Fetal surface first) - MORE COMMON (~80%)

• Separation begins at the CENTER of the placenta
• Blood accumulates behind placenta forming a retroplacental hematoma
• Placenta delivers with the fetal (shiny) surface first
• Bleeding occurs after placenta is expelled
• Cleaner, less blood loss
• "Shiny Schultze"

2. Duncan Mechanism (Marginal/Maternal surface first) - ~20%

• Separation begins at the EDGE/MARGIN of the placenta
• Blood trickles out from the side before placenta is fully separated
• Placenta delivers with the maternal (dull, rough, red) surface first
• Slides down sideways
• More blood loss
• "Dirty Duncan"

10. Degrees of Perineal Laceration

• 3rd and 4th degree = obstetric anal sphincter injuries (OASI)
• Repair done in OR under anesthesia
• Median episiotomy → higher risk of 3rd/4th degree extension
• Risk factors: large baby, instrumental delivery, prolonged 2nd stage, shoulder dystocia

📊 PARTOGRAM SKETCH GUIDE

• Draw Alert line from 4 cm at admission sloping at 1 cm/hour
• Draw Action line 4 hours to the right of alert line
• The cervical progress from hr 6-8 (arrest) crossed the alert line → this triggered the diagnosis of protracted/arrested labor

Quick tip for your exam: The key abnormality in this case is the slowing of contractions (lagging) at hour 6 with no progress at hour 8 (arrest in active phase), followed by recovery. The second problem is the protracted second stage at hour 16. Management centers on the 3 P's assessment and judicious use of oxytocin augmentation and/or operative delivery.

PARTOGRAM CORRELATION WITH CASE 1

Referenced to Williams Obstetrics

📊 READING YOUR PARTOGRAM - Point by Point

• O = Cervical dilation (cm) - left Y-axis
• X = Fetal station - right Y-axis (note: right side reads -5 at top going to +5 at bottom - inverted, as is standard)
• △ = RBOW (Rupture of Bag of Waters)

Q1. EDC and AOG

• October 26 → add 9 months → July 26, 2026 → add 7 days → August 2, 2026
• EDC = August 2, 2026

• Count from LMP Oct 26, 2025 to July 28, 2026
• = 39 weeks and 2 days
• (Confirmed by Ballard Score of 39 weeks at delivery)

Q2. Bishop's Score on Admission & Interpretation

• Score ≥6 = Favorable cervix
• A score of 8 or more = high likelihood of successful labor induction (similar to spontaneous labor)
• Score of 6-7 = favorable; labor expected to progress
• This patient with score 6 has a favorable cervix - she is already in active labor with adequate contractions; no cervical ripening is needed

Q3. Problem at the 16th Hour of Labor & Management

• At hour 16 (= 10 hrs after admission): cervix was 9 cm, 80% effaced, Station -1, RBOW
• At hour 20 (= 14 hrs after admission): fully dilated, fully effaced, Station 0, good contractions

• 6 hours after admission → 6 cm → progresses to
• 8 hours after admission → STILL 6 cm (NO CHANGE) → contractions lagged to every 5-8 min
• 12 hours → 9 cm
• 16 hours → FULLY dilated (10 cm), Station 0

THE PROBLEM AT 16TH HOUR:

• Problem = ARREST OF ACTIVE PHASE (no cervical change from 6 cm at hour 6 to 6 cm at hour 8 + contractions lagged)
• This is what the handwritten note "Protrack" refers to - Protracted/Arrested labor

MANAGEMENT:

1. Assess the 3 P's - Power (contractions), Passenger (fetal size/position), Passage (pelvis)
2. Amniotomy (AROM) - if membranes intact (here RBOW happened at hour 12, so already ruptured)
3. Assess contraction adequacy - Montevideo Units (MVUs); ≥200 MVUs/10 min = adequate
   • At hour 12: contractions = 240 MVUs = ADEQUATE → arrest despite adequate power suggests Passenger or Passage problem
4. If contractions inadequate: Oxytocin augmentation - start at 2 mU/min, increase every 15-40 min
5. Re-evaluate for CPD (cephalopelvic disproportion) - if no progress despite adequate contractions
6. Operative vaginal delivery (forceps/vacuum) if 2nd stage with adequate descent
7. Cesarean section if:
   • Arrest despite adequate contractions
   • CPD
   • Non-reassuring fetal status

Q4. At What Hour Did Patient Enter Active Phase?

• Active phase begins at 6 cm cervical dilation (ACOG/SMFM 2014 consensus, incorporated into Williams)
• Previously was defined as ≥4 cm; updated to ≥6 cm

• Latent phase = from onset of contractions to 6 cm = included the hours before admission + first 8 hrs after admission
• She had contractions for 8 hours before admission + 8 hours in hospital = latent phase total ~16 hours
• Per Williams: prolonged latent phase = >20 hours in nulliparas, >14 hours in multiparas
• This patient (multigravida): latent phase appears borderline prolonged

Q5. When Did She Enter Pelvic Division & Abnormalities

• She reached 9 cm at hour 18 (12 hrs after admission)
• Fully dilated at hour 20 (16 hrs after admission)
• She entered the pelvic division at approximately Hour 18-20 on the chart (12-16 hrs after admission)

ABNORMALITIES DURING THE PELVIC DIVISION:

1. Protracted Descent in the second stage:
   • At full dilation (hour 20): Station 0 - head not yet below the ischial spines
   • Normal in multipara: descent should progress at ≥2 cm/hr
   • Head at station 0 at full dilation = no descent despite full dilation
2. Prolonged Second Stage:
   • She was fully dilated at hour 20, delivered ~hour 26 (18.5 hrs after the start = ~30 min after hour 26 point)
   • Total second stage = approximately 1.5-2 hours
   • For a multigravida: normal 2nd stage ≤1 hour (≤2 hours with epidural)
   • This is at the upper limit / borderline prolonged for a multipara
3. RBOW (marked with △ on your partogram): Occurred spontaneously at ~hour 20 (18 hrs after admission) during the pelvic division - this is normal (spontaneous ROM during 2nd stage)

Q6. Ritgen's Maneuver

1. As the fetal head distends the perineum, place a folded towel over the anus
2. With one hand, apply gentle upward pressure on the fetal chin through the posterior perineum (between the anus and the tip of the coccyx)
3. Simultaneously, with the other hand, apply gentle downward pressure on the occiput (crown)
4. This maneuver is performed BETWEEN contractions (Modified Ritgen's)
5. The fetal head is delivered by extension - the smallest diameter (suboccipitobregmatic) passes over the perineum

• Allows controlled, deliberate extension of the fetal head
• Reduces the risk of sudden, uncontrolled expulsion
• Protects the perineum and reduces lacerations
• Delivers the head at the most favorable (smallest) diameter

Q7. Median vs. Mediolateral Episiotomy

Q8. Signs of Placental Separation

1. 🔴 Sudden gush of blood from the vagina - blood that was dammed behind the placenta is suddenly released
2. 🟡 Lengthening of the umbilical cord - as placenta descends into the lower uterine segment, cord visibly lengthens at the introitus
3. 🟢 Change in uterine shape - uterus becomes globular and firm (from discoid/broad flat shape; "Calkin's sign")
4. 🔵 Rise of the uterine fundus in the abdomen - as placenta descends out of the upper segment into the lower segment, fundus rises above the umbilicus

Q9. Mechanism of Placental Separation

1. Schultze Mechanism ("Shiny Schultze") - ~80% of cases

• Separation starts at the CENTER of the placenta
• Blood accumulates as a retroplacental hematoma behind the placenta
• This blood helps "push" the placenta forward
• Placenta slides out fetal surface (shiny, smooth) first
• Cord descends centrally
• Bleeding is not visible until AFTER placenta delivers (blood contained behind)
• Less blood loss overall

2. Duncan Mechanism ("Dirty Duncan") - ~20% of cases

• Separation starts at the MARGIN/EDGE of the placenta
• Blood seeps laterally and escapes at the cervical os before full separation
• Placenta slides out sideways, with maternal surface (rough, cotyledonous, red) emerging first
• Bleeding precedes placental expulsion
• Slightly more blood loss

Q10. Degrees of Perineal Laceration

• 3rd and 4th degree = Obstetric Anal Sphincter Injuries (OASI)
• Risk factors for OASI: Nulliparity, macrosomia, forceps delivery, occiput posterior, prolonged 2nd stage, midline episiotomy
• Midline episiotomy has 4-5x higher risk of extending to 3rd/4th degree vs. mediolateral
• 4th degree repair: close rectal mucosa → repair IAS → repair EAS (end-to-end or overlap technique) → close remaining perineum in layers

📊 PARTOGRAM SUMMARY - Abnormalities Identified

CORRECTED ANSWERS - CASE 1

Per Williams Obstetrics, Correlated with Partogram

Q1. EDC and AOG

Q2. Bishop's Score on Admission (Hour 8 on chart)

• ≥6 = favorable; labor expected to progress without need for cervical ripening
• Patient is already in active labor with strong contractions - score confirms she will progress

Q3. Problem at the 16th Hour & Management

• Cervix = 6 cm (same as hour 14 = 6 hrs after admission)
• Station = -3 (no descent)
• Contractions lagged to every 5-8 min, 40-60 sec, moderate-strong

Arrest of active phase = no cervical change for ≥2 hours with adequate contractions

Management (Williams Obstetrics):

• Power: Contractions lagged → inadequate → this IS the cause here
• Passenger: Baby 3,000 g, cephalic → no obvious CPD
• Passage: No clinical evidence of contracted pelvis mentioned

• Membranes were still intact at hour 16 (RBOW happened later at hour 26)
• AROM is indicated → releases prostaglandins → stimulates contractions

• Start at 2 mU/min IV, increase by 2 mU/min every 15-40 minutes
• Target: ≥200 Montevideo Units (MVUs) in 10 min = adequate uterine activity
• (At hour 20 = 12 hrs after admission → contractions were 240 MVUs → adequate → this is when progress resumed)

• CTG to monitor fetal wellbeing during augmentation

• If no progress despite ≥200 MVUs for ≥4 hours → Cesarean section
• This patient progressed (9 cm at hour 20) → augmentation worked

Q4. At What Hour Did Patient Enter Active Phase?

• Hour 8 (admission) = 4 cm → Latent phase
• Hour 14 (6 hrs after admission) = 6 cm → Active phase begins here

• Latent phase: Hour 8 to Hour 14 (4 cm → 6 cm over 6 hrs)
• Active phase: Hour 14 onwards (6 cm → 10 cm)
• Rate of dilation in active phase: 6→9 cm from hour 14 to hour 20 = 3 cm in 6 hrs = 0.5 cm/hr
• Normal multipara rate = ≥1.5 cm/hr → this is protracted (explains the arrest pattern)

Q5. When Did She Enter Pelvic Division & Abnormalities

• Preparatory Division = Latent phase
• Dilational Division = Active phase (maximum slope of dilation)
• Pelvic Division = Deceleration phase (9-10 cm) + Second stage (full dilation to delivery)

• 9 cm at Hour 20 (12 hrs after admission) = deceleration/pelvic division begins
• 10 cm at Hour 24 (16 hrs after admission) = second stage begins fully

ABNORMALITIES DURING PELVIC DIVISION (Hour 20 onwards):

• From hour 24 to hour 26 = 2 hours, station went 0 → +1 = 1 cm descent in 2 hours = protracted descent

• Second stage = Hour 24 (full dilation) to delivery at ~Hour 26.5
• Duration = approximately 2-2.5 hours
• Williams normal limit for multipara = ≤1 hour (≤2 hrs with epidural)
• This is prolonged second stage for a multipara (no epidural mentioned)

• Station remained at -3 from admission (Hour 8) all the way to Hour 16 = no descent at all during the arrest period
• This confirms the arrest was related to inadequate contractions, not to the head being engaged

• Spontaneous rupture occurred at Hour 26 = just before delivery
• This is late SROM (during active pushing phase) - normal variant

PARTOGRAM - Complete Corrected Data Table

FINAL DIAGNOSIS FROM PARTOGRAM:

1. Arrest of Active Phase (Hours 14-16: 2 hrs at 6 cm with lagging contractions)
2. Protracted Active Phase (rate <1.5 cm/hr for multipara)
3. Protracted Descent in Second Stage (0 → +1 in 2 hours)
4. Prolonged Second Stage (~2-2.5 hours in a multipara)
5. Resolved with spontaneous vaginal delivery - no operative intervention needed

For Q6-Q10 (Ritgen's Maneuver, Episiotomy types, Signs/Mechanism of placental separation, Degrees of laceration) - answers remain the same as before; they are not affected by the partogram correction. Let me know if you want me to restate any of those!

Questions 6 to 10 - Concise Answers

(Williams Obstetrics)

Q6. Ritgen's Maneuver

• One hand applies upward pressure on fetal chin through the posterior perineum (between anus and coccyx), using a towel
• Other hand applies downward pressure on the occiput
• Performed between contractions (Modified Ritgen's - preferred)

Q7. Median vs. Mediolateral Episiotomy

Q8. Signs of Placental Separation

1. Sudden gush of blood from vagina
2. Cord lengthens at the introitus
3. Uterus becomes globular and firm (Calkin's sign)
4. Fundus rises in the abdomen

Q9. Mechanism of Placental Separation

Q10. Degrees of Perineal Laceration

• 3rd + 4th degree = OASI (Obstetric Anal Sphincter Injuries)
• Repair in OT under anesthesia
• Midline episiotomy = highest risk of 3rd/4th degree extension
• Risk factors: nullipara, macrosomia, forceps, OP position, prolonged 2nd stage

Q6. Ritgen's Maneuver

• Upward pressure on fetal chin through perineum + downward pressure on occiput
• Done between contractions (Modified Ritgen's)
• Delivers head by controlled extension → protects perineum
• VERTEX only - NOT breech

Q7. Median vs. Mediolateral Episiotomy

Q8. Signs of Placental Separation

1. Sudden gush of blood
2. Cord lengthens at introitus
3. Uterus becomes globular and firm (Calkin's sign)
4. Fundus rises in abdomen

Q9. Mechanism of Placental Separation

Q10. Degrees of Laceration

• 3rd + 4th = OASI → repair in OT
• Midline episiotomy = highest extension risk

➕ Frequency vs. Interval of Contractions

• Frequency = how many contractions occur in 10 minutes (e.g., "3 contractions in 10 minutes")
• Interval = the time from the START of one contraction to the START of the next (e.g., "every 3-5 minutes")

Simple: Interval is the gap between contractions; Frequency is how many you count in 10 minutes. They say the same thing in two different ways — if interval is every 2 min, frequency is ~5 in 10 min.

PARTOGRAPH - DIAGNOSIS & MANAGEMENT

Complete OSCE Guide (Williams Obstetrics)

🔑 FIRST: HOW TO READ THE PARTOGRAPH

📌 STEP 1: IDENTIFY THE PHASE

📌 STEP 2: IDENTIFY THE PROBLEM

🟡 LATENT PHASE

• If contractions inadequate → Oxytocin augmentation
• If contractions adequate → Wait (may resolve spontaneously)
• Therapeutic rest (morphine sedation) can be considered
• Reassess; if no progress → C-section

🔴 ACTIVE PHASE

A. Protracted Active Phase (slow but moving)

B. Arrest of Active Phase (STOPPED - no change ≥2 hrs)

⚠️ Important add-on: Before giving oxytocin - always do AROM first (if membranes intact) - releases prostaglandins and stimulates better contractions. Then start oxytocin if still inadequate.

⚠️ Oxytocin rule: Always augment before crossing the action line (4 hrs from alert line). If curve crosses action line = already delayed - need urgent reassessment.

🟠 DECELERATION PHASE (8-10 cm)

A. Prolonged Deceleration Phase

B. Failure to Decelerate / Arrest of Dilation here

• Same as active phase arrest
• But NOW also assess fetal station closely
• If head descending well → can attempt OVD
• If no descent + no dilation → C-section

🔵 SECOND STAGE

A. Prolonged Second Stage

B. Failure of Descent / Arrest of Descent in 2nd Stage

⚠️ Key rule for 2nd stage:

• OVD = head must be at ≥+2 station, fully dilated, membranes ruptured, adequate pelvis
• C-section = if OVD criteria not met OR OVD failed

📌 STEP 3: MANAGEMENT FLOWCHART

Abnormal Partograph
        |
   Which phase?
        |
   _____|_______________________
  |                             |
LATENT                       ACTIVE / DECEL
Prolonged?                        |
  → Oxytocin / Wait          Protracted or Arrest?
  → C-sec if fails               |
                          Check contractions
                          (MVU or frequency)
                          /              \
                   Inadequate           Adequate
                   (lagging)          (≥200 MVUs)
                      |                    |
                  AROM + Oxytocin      4 hrs → C-SEC
                  Reassess 6 hrs
                  → No progress → C-SEC
                        |
                    2ND STAGE
                   /          \
           Prolonged        Arrest of Descent
               |                   |
           OVD or C-sec      Station ≥+2 → OVD
                             Station <+2 → C-SEC

📌 QUICK REFERENCE NUMBERS TABLE

📌 OSCE ANSWER TEMPLATE

"Looking at this partograph, the cervical dilation curve shows (finding) in the (phase). The rate of dilation is (cm/hr), which is less than the expected (1.2/1.5) cm/hr for a (NP/MP). Fetal station shows (no descent/protracted descent). This is consistent with (diagnosis). Management would be (oxytocin/AROM/OVD/C-section) because (reason)."

⚡ LAST MINUTE TIPS FOR TODAY

1. Always state NP vs MP - numbers differ!
2. Crossing the action line = already in trouble = escalate management
3. Adequate contractions = ≥200 MVUs or 3-5 contractions/10 min - if adequate + no progress = C-section
4. OVD needs: Full dilation + station ≥+2 + ruptured membranes + adequate pelvis + no CPD
5. 2nd stage arrest with head low = OVD; head high = C-section
6. AROM first, then oxytocin if still inadequate - never jump straight to C-section without augmentation trial (unless adequate contractions already)

📊 PRACTICE PARTOGRAPH 1

• Membranes ruptured at Hour 6 (AROM done)
• No anesthesia given
• Fetal heart rate: reassuring throughout
• Hour 18 = 2 hours fully dilated, still at +1

1. What is the diagnosis?
2. What is your management?

📊 PRACTICE PARTOGRAPH 2

• Membranes intact at Hour 10
• No anesthesia
• FHR: reassuring
• MVU estimated at ~220 at hour 10

1. What is the diagnosis?
2. What is your management?

📊 PRACTICE PARTOGRAPH 3

• Membranes intact throughout
• No anesthesia
• FHR: reassuring
• She has been in labor for a total of 22 hours by Hour 0 on the chart

1. What is the diagnosis?
2. What is your management?

PARTOGRAPH 1 (NP) ✅ MOSTLY CORRECT - Small fixes needed

• 6th hr → 0 (unclear top), 8th hr → 6cm → Oxytocin augmentation
• 14th hr → 10cm
• 4th hour → 2° arrest of dilation → Oxytocin aug ✅
• 18th hour → Prolonged 2nd stage 2° to arrest in descent → C-sec

• At hour 18 = 2 hours fully dilated (NP, no anesthesia)
• NP limit without anesthesia = >2 hrs = Prolonged 2nd stage ✅
• Station still at +1 = Arrest of Descent (no change from hr 16 to 18)
• Your management "C-sec" - NOT quite right yet

• Station is +1 (not yet ≥+2) → head too high for forceps/vacuum safely
• BUT NP at +1 with arrest → reassess carefully
• If +1 and progressing → wait + push
• If truly arrested at +1 → C-section ✅ (your answer is acceptable here)
• If station were +2 or below → OVD first

PARTOGRAPH 2 (MP) ❌ NEEDS CORRECTION

• 0th hour → active phase
• 10th hour → Prolonged deceleration phase 2° to failure in descent → C-sec (× Amniotomy - good contractions)

• NOT deceleration phase (deceleration = 9-10cm, she is only 8cm)

• Contractions ARE adequate (≥200 MVU)
• Membranes INTACT → do AMNIOTOMY first
• Already adequate contractions + arrest = after AROM, reassess
• If still no progress after 4 hrs with adequate contractions → C-section ✅

PARTOGRAPH 3 (NP) ✅ CORRECT!

• 22nd hour → Prolonged latent phase → Oxytocin augmentation & wait ✅

• NP limit = >20 hours
• She has been in labor 22 hours by admission + still in latent phase at hour 22 on chart
• Still only 5-6cm = still latent/early active

• Contractions are weak (2-3 in 10 min, mild-mod) = inadequate
• Give oxytocin to strengthen contractions
• Wait and reassess
• If no progress after adequate contractions → C-section

OVERALL SCORECARD

⚡ KEY CORRECTION TO MEMORIZE

Deceleration phase = 9 to 10 cm ONLY Active phase arrest = stuck at any cm from 6-8 cm for ≥2 hrs

PARTOGRAPH 2 - CORRECTED FEEDBACK

• Deceleration phase = 8 cm onwards
• Patient reached 8 cm at hour 4, then stuck at 8 cm from hour 4 to hour 10 = 6 hours no change

Prolonged Deceleration Phase → 2° Failure/Arrest of Descent → C-section

• She entered deceleration phase at 8 cm ✅
• Stayed at 8 cm for 6 hours = prolonged ✅
• Station stuck at 0 throughout = failure of descent ✅
• Contractions adequate (~220 MVU, 5 in 10 min) = no point augmenting
• Membranes intact → Amniotomy can be tried first
• But with adequate contractions + no descent + 6 hrs arrested = C-section ✅

• ❌ Amniotomy (because contractions already adequate - won't help much)
• → C-section ✅

REVISED SCORE: 9/10 🟢

📊 PRACTICE PARTOGRAPH

• Membranes ruptured spontaneously at Hour 8
• FHR: reassuring throughout
• No anesthesia given

1. Diagnosis?
2. Management?

• MP (A)
• Hour 8 → fully dilated → 2nd stage; S+2, contractions adequate
• Hour 9-11 = 2 hrs fully dilated → Prolonged 2nd stage of labour 2° to arrest of descent at +2 → OVD ✅

YOU ARE 100% CORRECT! 🎉

• Hour 8 to Hour 11 = 3 hours = Prolonged 2nd stage ✅
• Station at +2 = head low enough = OVD ✅ (vacuum or forceps)

SCORE: 10/10 🟢🌟

• Identified MP ✅
• Identified prolonged 2nd stage ✅
• Identified arrest of descent ✅
• Chose OVD because station ≥+2 ✅

Remember for OSCE: Station ≥+2 → OVD Station <+2 → C-section