Embryonic Development Milestones — NEET Biology
✅ Asked in NEET 2026What are the major features of embryonic development at various months of pregnancy? The human pregnancy lasts 9 months. Do you know for how many months pregnancy last in dogs, elephants, cats? Find out. In human beings, after one month of pregnancy, the embryo's heart is formed. The first sign of growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. By the end of the second month of pregnancy, the foetus develops limbs and digits. By the end of 12 weeks (first trimester), most of the major organ systems are formed, for example, the limbs and external genital organs are well-developed. The first movements of the foetus and appearance of hair on the head are usually observed during the fifth month. By the end of about 24 weeks (end of second trimester), the body is covered with fine hair, eye-lids separate, and eyelashes are formed. By the end of nine months of pregnancy, the foetus is fully developed and is ready for delivery.
NTA tests students on memorizing key developmental milestones across pregnancy months: heart formation at 1 month, limbs/digits by 2 months, major organ systems by 12 weeks, movements/hair by 5 months, and full development by 9 months. Students commonly confuse which organs develop in which trimester or mix up the timeline. The trick: NTA asks about specific organ formation timing (e.g., 'when do external genital organs develop?'), requiring precise month/week recall. Remember: first trimester = basic organs form; second trimester = refinement and movements begin; third trimester = maturation. Link each milestone to its exact timeframe for guaranteed accuracy.
This paragraph was tested 3 times in NEET.
Match embryonic development with months of pregnancy — A. Foetus movement starts and hair appears on head, B. Limbs and digits develop, C. External genital organs develop, D. Body covered with fine hair; eyelids separate.
Find the correct statements: A. In the human pregnancy, the major organ systems are formed at the end of 12 weeks. B. In human pregnancy the major organ systems are formed at the end of 8 weeks. C. In human pregnancy heart is formed after one month of gestation. D. In human pregnancy, limbs and digits develop by the end of second month. E. In human pregnancy the appearance of hair is usually observed in the fifth month. Choose the correct answer:
Match List-I with List-II relating to major features of embryonic development at different timings of pregnancy: List I (No. of weeks) A. After 4 weeks of pregnancy B. After 12 weeks of pregnancy C. After 24 weeks of pregnancy D. After 8 weeks of pregnancy List II (Major features) I. Eye-lids separate and eyelashes are formed II. Heart is formed III. Limbs and digits are developed IV. External genital organs are well developed Choose the correct answer:
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.