Topic: Fertilisation, embryo development to blastocyst, implantation· Reproduction

Fertilization in humans is practically feasible only if :

1. the sperms are transported into vagina just after the release of ovum in fallopian tube.

2. the ovum and sperms are transported simultaneously to ampullary - isthmic junction of the fallopian tube.

3. the ovum and sperms are transported simultaneously to ampullary - isthmic junction of the cervix.

4. the sperms are transported into cervix within 48 hrs of release of ovum in uterus.

Doubtly Asked 30 Oct 2026 NEET UG 2016 Phase 1 Practice test neet Save WhatsApp Report

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Answer: 2. the ovum and sperms are transported simultaneously to ampullary - isthmic junction of the fallopian tube.

Key idea: Fertilization occurs in the ampulla of the fallopian tube, at the ampullary-isthmic junction.

So the ovum and sperms must reach that junction at about the same time. Sperms placed in the vagina after ovulation are not enough by themselves, and the cervix is not the site of fertilization. Option (2).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Fertilization in humans is practically feasible only if :

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