Infanticide in Forensic Medicine and Toxicology (FMT)

Definition

• Infanticide Act, England (1938): The killing of a child under 1 year by the mother while suffering from a disease of the mind due to stress of pregnancy, delivery, puerperium, or lactation.
• India: There is no special Infanticide Act. The killing of a newborn is treated the same as murder under the IPC/BNS.

• Feticide: killing of the fetus at any time prior to birth
• Neonaticide: deliberate killing of a child within 24 hours of birth
• Filicide: killing of a child by its parents

• The Essentials of Forensic Medicine and Toxicology, 36th edition (2026), Ch. 19

Law

England

• Infanticide Act 1922: The first act - allowed for disturbed mental balance due to delivery effects. Only applicable in England.
• Infanticide Act 1938 (Section 1): "Where a woman by any willful act or omission causes the death of her child being under the age of 12 months, but at the time of the act or omission the balance of her mind was disturbed by reason of her not having fully recovered from the effect of giving birth to the child or by reason of the effect of lactation consequent upon the birth of the child, she shall be guilty of felony, to wit of infanticide..."

1. Only the mother can be charged with infanticide - any other person (including husband) is charged with murder/manslaughter.
2. The child must have been born alive (and be viable).
3. It must have been killed.
4. The mother must be suffering from disease of the mind related to childbirth.

India

• Whoever by secretly burying or otherwise disposing of the dead body of a child intends to conceal its birth - imprisonment up to 2 years.
• If the child is a girl - rigorous imprisonment up to 2 years, or fine, or both.

• P C Dikshit Textbook of Forensic Medicine and Toxicology, pp. 322-324

Motives

Uncivilized societies

1. Survival of the fittest - destruction of malformed or "less valuable" infants
2. Tribal superstitions (twin births, children born with teeth, leg presentations)
3. Ritual beliefs (eating firstborn to gain strength)

Civilized societies

1. To get rid of illegitimate children
2. Mother is a widow or unmarried
3. Parents belong to socially/economically weaker sections

• P C Dikshit Textbook of Forensic Medicine and Toxicology, p. 321

Key Questions for the Medical Expert

1. Is the body that of a viable child?
2. Is the body that of the child of the accused?
3. Was the child stillborn or dead-born?
4. Was the child born alive?
5. If born alive, how long did it survive?
6. What was the cause of death?

Viability

• Viability = capability of having separate existence after birth by virtue of development.
• In law, a fetus that has not completed the 7th month of intrauterine life is considered non-viable (incapable of separate existence).
• Charge of infanticide cannot be supported if the infant can be proved to be under 7 months gestational age.
• The court may require evidence of whether the infant had attained the 28th week of gestation.

Stillbirth vs Dead Birth vs Live Birth

Signs of Live Birth

External Examination

• Presence of cry marks/cry scratches (laryngeal folds congested)
• Air in GI tract: stomach (15 min), small intestine (1-2 hrs), colon (5-6 hrs), rectum (12 hrs)
• Inflammatory ring at umbilical base in 36-48 hours
• Umbilical cord falls off 5th-6th day, scar in 10-12 days
• Meconium evacuation

Internal Examination - Lungs (most important)

• Chest shape: flat before respiration; drum-shaped/arched after.
• Diaphragm: at 4th-5th rib level before breathing; at 6th-7th rib level after breathing.
• Bloodstained froth in bronchi/bronchioles = positive sign of respiration.

Hydrostatic Test (Raygat's Test)

1. Tie ligature on bronchi and separate lungs.
2. Place each whole lung in water - floats if respiration has occurred.
3. If it floats, cut each lung into 12-20 pieces and place in water.
4. If the pieces float, squeeze under water - air bubbles escape (true air, not putrefaction).
5. If still floating after squeezing, they are wrapped in cloth and compressed with a weight.

1. Putrefactive gases - soft, greenish lungs, large uneven gas bubbles that collapse on pricking; signs of decomposition visible
2. Artificial inflation - partial inflation only, stomach contains air but not intestines, no mottled appearance, little blood and no froth on section

1. The fetus is a monster
2. The fetus is macerated or mummified
3. Fetus born before 180 days gestation
4. Stomach of fetus contains milk
5. Umbilical cord has separated and a scar has formed

Other Tests for Live Birth

• The Essentials of Forensic Medicine and Toxicology, 36th ed. (2026), pp. 423-428

Causes of Death of a Newborn

Natural Causes

Unnatural - Accidental

Unnatural - Criminal

1. Suffocation (Smothering): Nose closed with two fingers, lower jaw pushed up with palm. Other methods: pillow/towel over face, overlaying, pushing face into bedclothing, forcing mud/rag/cottonwool into mouth. Amount of force so minor that there may be no evidence of trauma.
2. Strangulation: Throttling or ligature strangulation; the umbilical cord itself may be used as a ligature.
3. Drowning: Immersion in water, bucket, well.
4. Blunt force/head injury: Striking, dashing infant's head against walls/floor - extensive comminuted/depressed skull fractures, brain contusions/lacerations, hemorrhage.
5. Sharp force: Cutting throat, stabbing.
6. Poisoning: Administration of opium, alcohol or other substances.

• Failure to clear airway
• Failure to ligate umbilical cord (death from hemorrhage)
• Failure to keep the infant warm (exposure)
• Failure to feed (starvation)
• Abandonment

Concealment of Birth (India)

• Secretly burying or disposing of dead body of child (born before, during, or after birth) to conceal its birth = up to 2 years imprisonment.
• If the child is a girl = rigorous imprisonment up to 2 years + fine.

Examination of the Alleged Mother

• Signs of recent delivery: breast engorgement, colostrum, lochia, perineal lacerations, dilated cervix, involution of uterus
• Mental condition must be assessed
• Her relationship to the child may need to be established

Medicolegal Significance

• The mother or her relatives may be accused of infanticide while the actual death may be due to precipitate labor (head injury, hemorrhage, asphyxia).
• Conversely, in a case of murder, death of the child may be falsely attributed to precipitate labor.
• Charge of infanticide cannot stand if the infant is proved to be under 7 months gestational age (non-viable).

Sources: The Essentials of Forensic Medicine and Toxicology, 36th ed. (2026) | Parikh's Textbook of Medical Jurisprudence, Forensic Medicine and Toxicology | P C Dikshit Textbook of Forensic Medicine and Toxicology

Causes of Death / Methods of Infanticide in FMT

I. Natural Causes

1. Immaturity / prematurity
2. Debility due to lack of general development
3. Congenital diseases (e.g., syphilis, congenital heart disease, lung disease, brain disease)
4. Malformations
5. Hemorrhage from umbilical cord, genital organs, stomach, rectum
6. Post-maturity
7. Pre-eclamptic toxaemia
8. Disease or abnormal separation of placenta (placenta praevia)
9. Neonatal infection
10. Intrapartum / antepartum anoxia
11. Cerebral birth trauma
12. Erythroblastosis fetalis

• Essentials of FMT, 36th ed. (2026)

II. Unnatural Causes - Accidental

During Birth

1. Prolonged labor - severe compression of head against contracted/deformed pelvis causes intracranial hemorrhage (subdural hemorrhage most common, usually bilateral), with or without fissured parietal bone fracture
2. Prolapse or pressure on the cord - causes asphyxia; cord compressed by fetal head especially in breech presentations
3. Twisting of cord around neck / knots of cord - strangulation without abrasions or ecchymoses
4. Injuries to the mother - blows/kicks on abdomen, falls from height causing concussion of fetal brain with or without skull fracture
5. Death of mother during labor - fetus can be delivered alive up to 5-10 minutes after maternal death

After Birth

1. Suffocation - membranes covering the head at birth; face accidentally pressed into blood/liquor amnii/meconium (a child can survive in membranes for 20-30 minutes)
2. Precipitate labor - delivery so rapid the mother is unaware; child may die from:
   • (A) Suffocation by falling into a lavatory pan
   • (B) Head injury / skull fracture with bilateral subdural hemorrhage (if woman was standing)
   • (C) Hemorrhage from torn umbilical cord

III. Unnatural Causes - Criminal

(A) Acts of Commission (Mechanical Violence)

1. Suffocation (most common method)

• Nose closed with two fingers + lower jaw pushed up with palm to occlude airway
• Placing pillow/towel over child's face and pressing down
• Pushing face into bedclothing (overlaying)
• Forcing mud, rag, or cottonwool into the mouth
• Pressure on the chest
• Key point: The force required is so minor that there may be no evidence of trauma
• If more force used: bruising of inner aspects of lips; foreign bodies (rag/cotton wool) in mouth/air passages with internal signs of asphyxia = homicidal
• Mucus and squamous respiratory epithelium from the victim may be found in smothering material

2. Strangulation

• Manual (throttling): bruises from finger pressure, depression and nail scratches on neck, injury to deeper tissues
• Ligature: ligature frequently left in situ (preserve as evidence); umbilical cord may be used as ligature to simulate an accident
• Important: Natural skin folds on neck of fat infants resemble ligature marks - dissection required to distinguish; in accidental cord strangulation, there are no excoriations around the mark
• In homicidal ligature strangulation, examination of umbilical cord shows rough handling with displacement of Wharton's jelly

3. Drowning

• Body of dead fetus thrown into well, tank, etc. - rare
• Microscopic examination of lungs shows foreign particles from drowning fluid

4. Burning

• Rare; used as a mode of disposal rather than primary method

5. Blunt Head Injury

• Dashing head against wall or floor while holding the feet (bruising of ankles/feet where gripped)
• Blows with blunt weapon
• Findings: depressed/comminuted skull fractures, subdural and subarachnoid hemorrhages, contusions and lacerations of brain and scalp
• Extradural hemorrhage in infants limited to single bones (dura adherent to skull along sutures)

6. Fracture/Dislocation of Cervical Vertebrae

• Caused by twisting the neck
• Laceration of spinal cord without external injury is not uncommon
• May also occur accidentally during correction of malposition or extraction of head in breech presentation

7. Wounds (Rare)

• Stab wounds - needles, pins, scissors penetrating heart, brain, medulla
• Concealed entry sites: through fontanelles, inner canthus of eye, up nostrils, down throat, nape of neck, up rectum - easily missed
• Incised wounds, cut-throat

8. Poisoning (Rare)

• Substances used (India/developing countries): Opium, calotropis juice, madar, tobacco, datura
• Substances used elsewhere: Insulin, antihistamines, tranquillisers, hypnotics
• In suspicious cases: preserve stomach and viscera for chemical analysis

(B) Acts of Omission / Neglect

1. Failure to arrange medical aid - omission to make necessary preparation for birth (evidence of no provision made suggests intent to destroy child)
2. Failure to clear the air passages - obstructed by amniotic fluid or mucus → suffocation
3. Failure to tie the umbilical cord after cutting → hemorrhage death (note: tearing of the cord rarely causes death as the vessels tend to contract)
4. Failure to protect the child from exposure to heat or cold → hypothermia/hyperthermia
5. Failure to supply proper food → starvation
6. Omission to remove the child from the mother's discharges → suffocation

Summary Table

Sources: The Essentials of Forensic Medicine and Toxicology, 36th ed. (2026) | Parikh's Textbook of Medical Jurisprudence, Forensic Medicine and Toxicology | P C Dikshit Textbook of Forensic Medicine and Toxicology

Haemorrhage in Forensic Medicine & Toxicology

Definition

Classification

1. Based on Cause

2. Based on Time of Occurrence

3. Based on Morphology / Appearance

4. Based on Vessel Type

Factors Governing Fatality

1. Total blood volume - fatal loss varies by individual
2. Rapidity of loss - the more rapid the loss, the more likely death
3. Site of haemorrhage - a small bleed into the brainstem is fatal; the same volume in the pleural cavity may be inconsequential
4. Age and sex - children and elderly are more severely affected; men resist haemorrhage better than women (though women can sustain enormous blood loss during childbirth)
5. State of health - a minor injury may be fatal in haemophilia or haemorrhagic diathesis

Mechanism of Haemorrhage Control

• Bleeding usually begins at the time of injury with a momentary delay (transient vascular spasm)
• Bleeding continues until normal haemostasis plugs the vessels
• In arterial injury: the musculo-elastic vessel may retract and its wall invaginates, forming an immediate seal
• In crushing injuries (e.g., railway amputation): crushing effect + arterial wall retraction may seal the cut vessel with minimal bleeding

Delayed Bleeding

1. Subcapsular haematoma (liver/spleen/lung) - capsule initially intact, then ruptures into peritoneal cavity
2. False aneurysm - trauma weakens vessel wall, ruptures later
3. Secondary haemorrhage - infection at injury site erodes vessel wall (cellulitis/abscess)
4. Post-mortem bleeding - passive, gravity-driven; usually small, but in serous cavities (pleura, peritoneum) may be larger

Death from Haemorrhage - Site and Mechanism

Postmortem Diagnosis of Death from Haemorrhage

• Extreme pallor of skin and mucous membranes
• Poor development of lividity (livor mortis)
• Wound or source of bleeding

• Pale, bloodless appearance of internal organs (especially spleen - collapsed sinusoids)
• Subendocardial haemorrhages in the heart
• Pale organs on cut section

• External: one square foot of blood on surface/clothing = approximately 100 ml of blood loss
• Internal: amount can often be measured directly at autopsy

Special Types Relevant to FMT

Petechiae (Tardieu's Spots)

• Minute pinpoint haemorrhages seen in:
  • Asphyxial deaths - on surface of lungs, under pleura, pericardium, thymus, conjunctivae
  • Livor mortis areas - rupture of small vessels from settling blood
• In asphyxia: multiple, uniform, pinpoint, on dependent surfaces of lungs (called Tardieu's spots)
• Distinguish from decomposition: putrefaction produces irregular, larger blebs under pleura that can be displaced by stroking

Subendocardial Haemorrhage

• Seen in deaths from shock/haemorrhage
• Found in the subendocardial layer of the left ventricle
• Also seen in asphyxia, carbon monoxide poisoning

Medicolegal Importance

1. Vitality of haemorrhage - presence of haemorrhage into tissues indicates the injury was inflicted during life (antemortem), not after death. Postmortem haemorrhage is passive and lacks surrounding reaction.
2. Haemorrhagic diathesis - if a victim has haemophilia, anticoagulant treatment, or liver disease, a minor injury may cause fatal bleeding. This has both criminal and civil implications.
   • A perpetrator who inflicted a minor blow is not exonerated because the victim had haemophilia (thin skull/eggshell skull rule).
3. Failure of haemostasis - if surgery is performed on a person with haemorrhagic diathesis and death follows, this has medicolegal significance.
4. Secondary haemorrhage - a wound that was not dangerous to life may become fatal if infected and erodes a vessel; this creates a chain of causation between original injury and death.
5. Post-mortem bleed vs antemortem bleed - important distinction:
   • Antemortem: clotted, surrounded by tissue reaction (vital reaction)
   • Postmortem: fluid, unclotted, no vital reaction, limited to dependent areas
6. Delayed haemorrhage - a person may survive initial injury and die days later from secondary haemorrhage; the original assault is still the legal cause of death.

Intracranial Haemorrhage (Overview - FMT relevance)

Sources: Parikh's Textbook of Medical Jurisprudence, Forensic Medicine & Toxicology | P C Dikshit Textbook of Forensic Medicine & Toxicology | The Essentials of Forensic Medicine & Toxicology, 36th ed. (2026) | Bailey & Love's Short Practice of Surgery, 28th ed.

Sudden Infant Death Syndrome (SIDS) in FMT

Definition

"The sudden death of an infant under 1 year of age which remains unexplained after a thorough case investigation, including performance of a complete autopsy, examination of the death scene, and review of the clinical history." -- National Institute of Child Health and Human Development (NICHD)

Epidemiology / Features

Triple Risk Model (Pathogenesis)

         VULNERABLE INFANT
               ↓
    CRITICAL DEVELOPMENTAL PERIOD
    (1 month to 1 year)
               ↓
    + EXOGENOUS STRESSOR(S)
               ↓
            SIDS

1. Vulnerable Infant (Infant Factors)

• Brainstem abnormalities → delayed development of arousal and cardiorespiratory control
• The medulla oblongata plays a key role in the arousal response to noxious stimuli (hypercapnia, hypoxia, thermal stress) during sleep
• Serotonergic (5-HT) system of the medulla is implicated - abnormalities in serotonin-dependent signalling underlie some cases
• Prematurity / low birth weight
• Male sex
• Product of multiple birth
• SIDS in a prior sibling (5-fold relative risk of recurrence)
• Antecedent respiratory infections
• Germline polymorphisms in autonomic nervous system genes

2. Critical Developmental Period

• The period of 1 month to 1 year during which cardiopulmonary control is still immature

3. Exogenous / Environmental Stressors

• Prone or side sleeping position (most important modifiable risk factor)
• Sleeping on a soft surface
• Hyperthermia / thermal stress
• Co-sleeping in first 3 months of life
• Prone position increases vulnerability to hypoxia, hypercapnia, and thermal stress, and is associated with decreased arousal responsiveness vs. supine

Parental / Social Risk Factors

• Young maternal age (<20 years)
• Maternal smoking during pregnancy
• Drug use in either parent (paternal marijuana; maternal opiate/cocaine)
• Short inter-gestational intervals
• Late or no prenatal care
• Low socioeconomic group

"Back to Sleep" Campaign

Autopsy Findings

Consistent/Common Findings:

1. Multiple petechial haemorrhages on thymus, visceral/parietal pleura, and epicardium (70-80% of cases) - agonal in nature, from terminal respiratory efforts against a closed glottis
2. Bloodstained fluid at mouth and nose (~50% of cases)
3. Froth in air-passages
4. Facial pallor; hands often clenched around bed-clothing fibres
5. Lungs: patchy or uniform purplish discoloration, firm, congested, oedematous, increased weight; patchy alveolar collapse; alveolar walls thickened with lymphocytic infiltration; peribronchiolar cell infiltration
6. Small amount of milky vomit in trachea and bronchi; shedding of tracheobronchial epithelial cells
7. Petechial haemorrhages in face or eyes (minority)
8. May show laryngitis, tracheitis, bronchitis, bronchiolitis, pneumonitis, pleuritis - but extent is rarely sufficient to explain death

In ~15-20% of SIDS cases: some pathological condition IS found

• Frank pneumonia
• Congenital heart disease
• Down's syndrome
• Tracheobronchitis
• These should be reclassified as Sudden Unexpected Infant Death (SUID), NOT true SIDS

SUID Postmortem Differential Diagnoses (Causes found at autopsy)

Theories of Mechanism

• Electrolyte imbalance
• Conductive (cardiac) disorders
• Respiratory distress / laryngospasm
• Metabolic disorders
• Overlaying (accidental suffocation)
• Viral infection
• Prominent tracheobronchial secretions

Medicolegal Importance of SIDS

1. Diagnosis of exclusion - a thorough autopsy, death scene investigation, and clinical history review are mandatory before labelling a death as SIDS.
2. Must exclude homicide - SIDS can be used to conceal infanticide (suffocation/filicide). Features that raise suspicion of homicide rather than SIDS:
   • Age >6 months (SIDS unlikely)
   • Multiple SIDS deaths in same family (raises suspicion of serial filicide)
   • Evidence of prior child abuse or Munchausen syndrome by proxy
   • Haemorrhages inconsistent with asphyxia pattern
3. Overlaying - must be distinguished from true SIDS (accidental suffocation by parent rolling onto infant during co-sleeping)
4. SIDS in a previous sibling = 5-fold relative risk, but also raises concern for intentional suffocation; both must be carefully considered.
5. Munchausen syndrome by proxy (Factitious disorder by proxy): A parent (usually mother) deliberately causes or fabricates illness in the child to attract medical attention. Some serial SIDS deaths in families have been attributed to this.
6. The extent of pathology found at autopsy in true SIDS is rarely sufficient to cause death - this is key to its definition and to distinguishing it from disease-caused infant death.

Key Points for Exam

• SIDS = diagnosis of exclusion; always requires full autopsy + scene investigation
• Peak age: 2-4 months
• Most important preventable risk factor: prone sleeping position
• Most consistent autopsy finding: petechiae on thymus, pleura, epicardium
• Mechanism: brainstem serotonergic system abnormality → failure of arousal
• "Back to Sleep" campaign significantly reduced incidence
• Multiple SIDS in one family must raise suspicion of filicide

Sources: The Essentials of Forensic Medicine & Toxicology, 36th ed. (2026) | Robbins & Kumar Basic Pathology | Robbins, Cotran & Kumar Pathologic Basis of Disease

SIDS - Hinglish mein Samjho 🍼

Definition

Yeh exclusion ka diagnosis hai - pehle sab kuch check karo, jab kuch nahi milta tab SIDS bolte hain.

Kaun Se Bacche Affected Hote Hain?

Triple Risk Model - 3 Cheezein Milti Hain Tab SIDS Hota Hai

    KAMZOR BABY  +  VULNERABLE PERIOD  +  BAHARI STRESS
    (Vulnerable     (1 mahine se          (Prone sleeping,
     infant)         1 saal)               garmi, infection)
                          ↓
                        SIDS

Kya Hota Hai Andar? (Pathogenesis)

• Normally jab neend mein oxygen kam ho ya CO2 badhe, toh brainstem signal deta hai - "uth jao, saans lo"
• SIDS babies mein yeh arousal mechanism fail ho jaata hai
• Serotonin (5-HT) system ka role hai - iske abnormalities se breathing control, BP, aur upper airway reflexes fail ho jaati hain
• Baby ko pata hi nahi chalta, woh neend mein hi chala jaata hai

Risk Factors - Kya Kya Khatre Badhata Hai?

Baby ke andar ke factors:

• Prematurity (samay se pehle paida hua)
• Low birth weight
• Pehle bhi ek bhai/behen ko SIDS ho chuka ho (5 guna zyada risk)
• Twins mein zyada

Maa-Baap ki wajah se:

• Maa cigarette peeti ho pregnancy mein (bahut important!)
• Drug use - baap ka marijuana, maa ka opium/cocaine
• Maa ki umar 20 saal se kam
• Pregnancy mein doctor nahi dikhaya
• Gareebi, kam education

Environment (Sabse Important - Badla Ja Sakta Hai!):

• Bachhe ko ulta (prone) sulana ← sabse bada risk factor
• Soft surface pe sulana
• Zyada garmi/sweating
• Co-sleeping (pehle 3 mahino mein maa-baap ke saath sona)

"Back to Sleep" Campaign

"Bachhe ko HAMESHA peeth ke bal (supine) sulao"

Postmortem Mein Kya Milta Hai?

Jo aksar milta hai:

1. Petechiae (chhote-chhote red spots) - thymus, pleura, heart pe (70-80% cases)
   • Yeh aakhri saans ke struggle se bante hain
2. Naak aur mooh pe bloodstained fluid (~50% cases)
3. Lungs - congested, heavy, purple discoloration, firm
4. Froth in airways
5. Haath aksar bedsheet ke dhage pakde hue hote hain

Kya NAHI milta:

• Koi serious disease nahi
• Koi injury ka sign nahi
• Jo milta hai woh itna nahi hota ki death explain ho sake

15-20% Cases Mein Kuch Aur Mil Jaata Hai

Medicolegal Importance - FMT Exam ke Liye

1. Exclusion diagnosis hai

• Bina poori autopsy ke SIDS diagnose mat karo
• Death scene investigation bhi zaruri hai

2. Homicide ko rule out karna MUST hai

• Baby 6 mahine se bada ho (SIDS unlikely)
• Ek hi family mein baar baar SIDS - serial filicide ka shak
• Child abuse ke purane signs
• Suffocation ke specific marks

3. Overlaying se fark karo

• Overlaying = Maa-baap neend mein baby pe let jaate hain → accidental suffocation
• SIDS mein koi external pressure nahi hota

4. Munchausen Syndrome by Proxy

• Maa khud bachhe ko bimar karti hai ya symptoms banati hai attention ke liye
• Kuch SIDS deaths actually filicide (deliberate suffocation) the

Ek Line Summary - Exam ke Liye

SIDS = 2-4 mahine ka healthy baby, sote waqt achanak mara, poori autopsy ke baad bhi reason nahi mila. Brainstem arousal failure + prone sleeping = common mechanism. Petechiae on thymus/pleura = common PM finding. Diagnosis of exclusion - homicide rule out karna zaroori hai.

Key Mnemonics

• Prone sleeping
• Recurrence (sibling history)
• Ethnicity (low socioeconomic)
• Male sex
• Age (peak 2-4 months)
• Twins
• Under 20 (young mother)
• Respiratory infection (antecedent)
• Environment (soft surface, co-sleeping)
• Cigarette/drugs (maternal)
• Overheating
• Prematurity
• Serotonin defect (brainstem)