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Biology · 2026 · 3 marks
CBSE 2026 · Region 3 · Set 1 · Q25
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…
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.
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