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Question:

In an assisted reproductive technology where gametes have been fertilized in vitro, which of the following is practicable for embryo transplantation in fallopian tube?

Only embryo up to 8 blastomeres if zygote is not transplanted.

Only zygote is transplanted not embryo.

Either zygote or embryo with 8 blastomere phase transplanted.

Morula with 8-24 celled stage is transplanted in fallopian tube.

Solution:

After the fusion of male and female gametes in the lab, the zygote is transferred to the fallopian tube only after it reaches the 8 blastomere phase. This is done so as to ensure the chances of successful implantation. So the correct answer is 'Either zygote or embryo with 8 blastomere phase transplanted'.