NEET Previous Year Question — Oriented Key Points
Highest-Frequency NEET Topics from REP-03
1. Saheli Classification (appears nearly every year)
- Saheli = NON-STEROIDAL oral contraceptive = centchroman
- Developed by CDRI, Lucknow
- Mechanism: Blocks estrogen receptors (SERM) → prevents implantation
- Frequency: Once weekly (not daily)
- Trap answer: "Steroidal preparation containing progesterone" → WRONG
2. ART — ZIFT vs GIFT vs IVF-ET (annual)
- ZIFT → Zygote → Fallopian tube (in vitro fertilization)
- GIFT → Gametes (unfertilized) → Fallopian tube (in vivo fertilization)
- IVF-ET → Embryo → Uterus (in vitro fertilization)
- Trap: "ZIFT transfers embryo to uterus" → WRONG (that's IVF-ET)
3. STD Pathogen-Disease Matching (annual)
- Gonorrhoea: Neisseria gonorrhoeae
- Syphilis: Treponema pallidum (spirochete)
- Chlamydiasis: Chlamydia trachomatis (obligate intracellular)
- Herpes: HSV-2
- Hepatitis B: HBV (DNA virus)
- HIV: HIV (retrovirus)
- Trichomoniasis: Trichomonas vaginalis (protozoan)
- Trap: "Treponema vaginalis" vs "Trichomonas pallidum" — species names are deliberately swapped
4. Copper IUD Mechanism (moderate frequency)
- Cu2+ ions = spermicidal + increase phagocytosis of sperm
- NOT hormonal — does NOT suppress gonadotropins
- Trap: "Copper IUD suppresses ovulation" → WRONG
5. PCPNDT Act and MTP Law (moderate frequency)
- PCPNDT 1994 = bans sex determination by all prenatal methods
- MTP standard limit = 20 weeks (NOT 24 — that's only for special categories, 2021)
- India's family planning programme = 1951
Predicted NEET 2026 High-Probability Topics
- 2021 MTP amendment (24 weeks) — new update, likely to be tested
- Saheli mechanism (centchroman as SERM)
- GIFT as the only ART with in vivo fertilization
- Hepatitis B vaccine as the only STD vaccine