Pregnancy and Delivery

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Pregnancy Diagnosis & Duration - Proof & Puzzles

  • Diagnosis Stages:
    • Presumptive: Amenorrhea, N/V, quickening (16-22 wks - later in primigravida).
    • Probable: Hegar's sign (6-8 wks), Goodell's sign (6 wks), Chadwick's sign (6-8 wks), positive hCG (now preferred over physical signs).
    • Positive: FHS (Doppler 8-10 wks; Fetoscope 18-20 wks), fetal movements (examiner >20 wks), USG (cardiac activity 6-7 wks).
  • Duration Estimation:
    • USG CRL (1st trimester - gold standard); BPD, HC, AC, FL later.
    • Naegele's Rule: LMP + 9 months + 7 days (less accurate than USG).
  • Forensic Aspects:
    • Puzzles: Superfecundation (multiple ova, same cycle, different acts); Superfetation (new conception in existing pregnancy - rare).
    • Delivery Signs: Recent (lochia, colostrum); Remote (parous os, old striae).

    ⭐ While Hegar's sign (softening of uterine isthmus at 6-8 weeks) remains a probable sign, ultrasound and hCG provide superior diagnostic accuracy in modern practice.

Ultrasound of early pregnancy with fetal pole and yolk sac

  • Delivery: Expulsion/extraction of fetus.
    • Live Birth: Post-expulsion, breathes or shows any sign of life (heartbeat, cord pulsation, muscle movement), irrespective of gestation/cord.
    • Stillbirth: Fetus born dead after 20-28 weeks gestation (varies by guidelines); no signs of life.
  • Signs of Live Birth:
    • Respiration: Primary. Hydrostatic Test (lungs float). 📌 Float for Life.
    • Circulation: Heartbeat, cord pulsation.
    • Muscular Movement: Voluntary.
  • Signs of Stillbirth:
    • Maceration: Aseptic autolysis (skin slippage, soft skull).
    • Mummification: Dry, shriveled.
  • Viability: Fetus capable of independent existence (modern practice: >24 weeks with advanced care; traditional: >28 weeks or >1000g).
  • Legal Implications:
    • Infanticide (Sec 80, 81 BNS).
    • Concealment of birth (Sec 83 BNS).

Hydrostatic Test: Key for live birth; lungs float if respired. Beware false +ves (putrefaction) & false -ves (brief gasps).

Abortion & MTP Act - Lawful Limits

MTP Act, 1971 (Amended 2021) regulates termination. Key lawful limits:

  • Up to 20 weeks: Opinion of 1 Registered Medical Practitioner (RMP).
    • Grounds: Risk to woman's life/health (physical/mental), rape, contraceptive failure (married woman/partner).
  • 20-24 weeks: Opinion of 2 RMPs.
    • For special categories: Rape survivors, minors, women with disabilities (physical/mental), substantial fetal malformation, change in marital status (widowhood/divorce), humanitarian settings/disaster.
  • Beyond 24 weeks: Medical Board approval for fetal abnormalities incompatible with life or significant maternal health risk ONLY. Strict criteria - not for manageable conditions with limited life expectancy.

*Special categories detailed in the point above.

MTP Amendment Act, 2021: Increased gestation limit to 24 weeks for defined special categories of women; Medical Board approval beyond 24 weeks limited to abnormalities incompatible with life or severe maternal health risk.

  • Consent:
    • Woman's consent is paramount.
    • If <18 years or mentally ill: Guardian's consent required.
  • 📌 "20-24-Board": Key limits for 1 RMP, 2 RMPs, & Medical Board approval respectively based on gestational age.

Infanticide & Neonatal Deaths - Tiny Tragedies

  • Infanticide: The term "infant" clinically refers to a child up to 1 year. BNS sections 90, 91, 93 address specific acts related to causing death of children before/after birth and concealment of birth, rather than defining "infanticide" as a distinct crime.
  • Neonatal Death: Death within first 28 days of life. Early (<7 days), Late (7-28 days).
  • Common Causes: Prematurity, Birth Asphyxia (most common in India), Infections (Sepsis, Pneumonia), Congenital Malformations, Trauma (accidental/non-accidental).
  • Signs of Live Birth:
    • Evidence of breathing (e.g., air in lungs/stomach).
    • 📌 Hydrostatic Test (Docimasia Pulmonum): Historical test with limited reliability; comprehensive examination required.
  • Battered Baby Syndrome (Caffey's Syndrome):
    • Multiple injuries, various healing stages.
    • Key indicators: Subdural hematoma, retinal hemorrhages, metaphyseal fractures.
  • Sudden Infant Death Syndrome (SIDS):
    • Sudden, unexplained death in an infant <1 year (peak incidence 2-4 months).
    • Risk factors include prone sleeping position.

⭐ The Hydrostatic test (Galen's test) is a historical test for live birth; modern forensic practice emphasizes comprehensive examination as this test has limitations and potential for false results.

High‑Yield Points - ⚡ Biggest Takeaways

  • Superfecundation: two ova, same cycle, different acts. Superfetation: fertilization in a subsequent cycle.
  • Recent delivery signs: lax perineum, lochia, subinvoluted uterus.
  • Criminal abortion (BNS 88-89) vs. legal termination under MTP Act (Amendment) 2021.
  • Fetal viability: key for infanticide; modern assessment considers case-by-case basis with neonatal care advances, not strictly 28 weeks / 1000g.
  • Live birth: determined by comprehensive evaluation including histological lung examination, alveolar expansion, food in stomach; hydrostatic test unreliable.
  • Paternity disputes: resolved by DNA fingerprinting.
  • Maternal deaths: common causes include hemorrhage, sepsis, illegal abortions.

Practice Questions: Pregnancy and Delivery

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Disputed maternity can be solved by using the following tests, EXCEPT:

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Flashcards: Pregnancy and Delivery

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Tests for confirming cessation of circulation:_____ test (Transillumination test)Failure to show redness in the web space between the fingers on transillumination from behind.

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Tests for confirming cessation of circulation:_____ test (Transillumination test)Failure to show redness in the web space between the fingers on transillumination from behind.

Diaphanous

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