Medical Termination of Pregnancy (MTP) at 4 Weeks Gestation - Clinical Guide

1. Pre-Abortion Workup: Tests to Order

Mandatory Tests

Additional Tests (Based on Clinical Judgment)

At 4 weeks, an intrauterine gestational sac may not yet be visible on TVUS. If the scan is inconclusive, wait 1-2 weeks or rely on rising beta-hCG levels to confirm intrauterine location before proceeding.

2. Treatment

Method of Choice at 4 Weeks: Medical Abortion

FDA-Approved Regimen (Standard Protocol)

• Mifepristone 200 mg orally (single dose)
• Mechanism: Selective progesterone receptor modulator - blocks progesterone, disrupts decidua, softens cervix

• Misoprostol 800 mcg buccally (4 x 200 mcg tablets held between gum and cheek for 30 minutes, then swallowed)
• Mechanism: Synthetic prostaglandin E1 analogue - causes uterine contractions and expulsion of products

Pre-medication Counseling Points

• Cramping and heavy bleeding are expected - this is the mechanism of action, not a complication
• Pass clots and tissue within 4-8 hours of misoprostol
• Mild bleeding may continue for up to 2 weeks
• Efficacy is slightly higher at earlier gestational ages

Surgical Alternative: Manual Vacuum Aspiration (MVA)

• If the patient prefers, or if medical abortion fails/is contraindicated
• Performed under local anesthesia as an outpatient procedure
• Uses a handheld manual vacuum aspirator or electric vacuum aspirator
• Very effective at this gestational age

Contraindications to Medical Abortion (Mifepristone)

• Confirmed or suspected ectopic pregnancy
• Chronic adrenal failure
• Long-term systemic corticosteroid therapy
• Hemorrhagic disorders or anticoagulant therapy
• Inherited porphyria
• IUD in place (must be removed first)
• Allergy to mifepristone or misoprostol

3. Medications Duration and Timeline

Pain Management During the Process

• Ibuprofen 600-800 mg orally 30-60 minutes before misoprostol (first choice - most effective)
• Paracetamol/acetaminophen 500-1000 mg as needed
• For severe pain: short-acting opioids may be prescribed

Anti-nausea (if needed)

• Ondansetron 4-8 mg or metoclopramide 10 mg orally before misoprostol

Rh-Negative Patients

• Anti-D immunoglobulin (RhoGAM) 50 mcg IM within 72 hours of abortion

Contraception (start immediately)

• Can initiate hormonal contraception (pill, patch, ring, implant) immediately after abortion
• Copper or hormonal IUD can be inserted at follow-up visit

4. Complications and Their Management

A. Incomplete Abortion (~2-5% with mifepristone regimen)

• Definition: Retained products of conception (POC) on TVUS after 2 weeks
• Management:
  • Repeat misoprostol 800 mcg (sublingual or vaginal)
  • OR surgical evacuation: manual vacuum aspiration (MVA) or suction curettage (D&C)

B. Ongoing Viable Pregnancy (~1%)

• Management: Surgical evacuation is recommended
• Note: If the patient continues the pregnancy after mifepristone exposure, there is a risk of fetal malformation - surgical termination is advised

C. Excessive Bleeding/Hemorrhage

• Heavy bleeding (soaking >2 pads/hour for >2 consecutive hours) is abnormal
• Management:
  • IV access + fluid resuscitation
  • Uterotonics: Oxytocin 10 IU IM or IV infusion, Misoprostol 600-800 mcg sublingually, or Methylergonovine (Methergine) 0.2 mg IM
  • Surgical evacuation (D&C or MVA) for retained POC causing hemorrhage
  • Blood transfusion if Hb drops significantly

D. Infection/Endometritis (<1%)

• Symptoms: Fever >38°C lasting >24 hours, pelvic pain, purulent discharge, uterine tenderness
• Management:
  • Doxycycline 100 mg twice daily x 14 days (first-line for outpatient mild infection)
  • OR Metronidazole 500 mg twice daily combined with Amoxicillin-clavulanate
  • Severe infection: hospitalize, IV broad-spectrum antibiotics (e.g., Clindamycin + Gentamicin)
  • Surgical evacuation if retained POC with infection

E. Failed Medical Abortion

• Definition: No expulsion after complete regimen
• Management: Repeat misoprostol OR proceed to surgical aspiration

F. Ectopic Pregnancy (must be ruled out BEFORE treatment)

• If suspected post-treatment (pain without expected bleeding pattern):
  • Urgent TVUS + serum beta-hCG
  • Treat as ectopic: Methotrexate 50 mg/m² IM (if criteria met) or surgical management (salpingostomy/salpingectomy)

G. Psychological Support

• Offer counseling and emotional support post-procedure
• Screen for depression or anxiety at follow-up

Summary Timeline

Day 1:   Mifepristone 200mg orally
Day 2-3: Misoprostol 800mcg buccally + pain relief (ibuprofen)
         + Anti-D if Rh negative
Day 3-14: Mild bleeding expected (no specific medication needed)
Week 2:  Follow-up TVUS or serum beta-hCG to confirm complete abortion
         + Start contraception

• Goldman-Cecil Medicine International Edition (Medication Abortion chapter), textbook
• Swanson's Family Medicine Review, Elective Abortion chapter, textbook
• Kaplan & Sadock's Comprehensive Textbook of Psychiatry, Fertility Control chapter, textbook
• Berek & Novak's Gynecology (References), textbook

Note: Local laws governing abortion (e.g., India's MTP Act, which permits termination up to 20 weeks with appropriate consent and documentation) must be followed. Always obtain written informed consent before proceeding.