CBSE 2026 · Region 3 · Set 1 · Q25 · 3 marks
In vitro fertilization (IVF) is a popular method these days that is helping childless couples to bear a child.(a)Write the different steps that are carried out in this technique.(b)Would you consider gamete intra fallopian transfer as a type of IVF ? Justify your answer.
In vitro fertilization (IVF) is a popular method these days that is helping childless couples to bear a child.
(a)
Write the different steps that are carried out in this technique.
(b)
Would you consider gamete intra fallopian transfer as a type of IVF ? Justify your answer.
Marking-scheme solution
(a)
Steps in IVF
Ova from wife/donor female and sperms from husband/donor male, are collected and induced to form a zygote under simulated conditions, in a laboratory.
The zygote or early embryos with up to $\displaystyle 8$ blastomeres could then be transferred in the fallopian tube (ZIFT) / embryos with more than $\displaystyle 8$ blastomeres could be transferred in the uterus (IUT)
(b)
• No
• During IVF fertilization takes place in the lab (outside the female
body)/ In this case fertilization takes place in female’s body.
Reproductive HealthInfertilityUnderstandshort_answermedium
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CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.