IVF and Embryo Transfer Techniques — NEET Biology
✅ Asked in NEET 2024In vitro fertilisation (IVF–fertilisation outside the body in almost similar conditions as that in the body) followed by embryo transfer (ET) is one of such methods. In this method, popularly known as test tube baby programme, ova from the wife/donor (female) and sperms from the husband/donor (male) are collected and are induced to form zygote under simulated conditions in the laboratory. The zygote or early embryos (with upto 8 blastomeres) could then be transferred into the fallopian tube (ZIFT–zygote intra fallopian transfer) and embryos with more than 8 blastomeres, into the uterus (IUT – intra uterine transfer), to complete its further development. Embryos formed by in-vivo fertilisation (fusion of gametes within the female) also could be used for such transfer to assist those females who cannot conceive.
NTA tests whether students understand the difference between IVF and other ART methods, specifically when to use ZIFT versus IUT. The core concept: zygotes or early embryos (up to 8 blastomeres) go into the fallopian tube via ZIFT, while older embryos (>8 blastomeres) go into the uterus via IUT. Students often confuse these transfer sites or forget the blastomere count cutoff. Remember: the earlier the embryo stage, the higher the transfer (fallopian tube); the later the stage, the lower the transfer (uterus). This matches natural embryo movement. Don't mix up IVF with IUD—IUD is a contraceptive, not an ART technique.
This paragraph was tested 3 times in NEET.
Which of the following is NOT an example of Assisted Reproductive Technology (ART)? (NEET 2024)
In which of the following techniques, the embryos are transferred to assist those females who cannot conceive? (NEET 2020)
Embryo with more than 16 blastomeres formed due to in vitro fertilisation is transferred into:
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.