Question

In zygote intrafallopian tube transfer, the embryo upto ____ stage is transferred into the fallopian tube

• A. 8 blastomeres
• B. 32 blastomeres
• C. 2 blastomeres
• D. 16 blastomeres

Hint:

ZIFT transfers the embryo at the 6-8 cell stage into the fallopian tube.

Answer 1

The Correct Option is A

• ZIFT Procedure: In zygote intrafallopian tube transfer (ZIFT), the embryo is transferred into the fallopian tube at an early developmental stage.
• Stage Analysis: The embryo is typically transferred at the 6-8 cell stage (around 8 blastomeres), which occurs 2-3 days after fertilization.
• Option Analysis:
  • (1) 8 blastomeres: Matches the typical stage for ZIFT. Correct.
  • (2) 32 blastomeres: Occurs later (morula stage), not used in ZIFT.
  • (3) 2 blastomeres: Too early (4-cell stage), not standard.
  • (4) 16 blastomeres: Intermediate stage, but 8 is more common.
• Conclusion: The correct answer is (1) 8 blastomeres, as it aligns with the ZIFT protocol.