Question

Assisted reproductive technology, IVF involves transfer of

• A. Zygote into the fallopian tube
• B. Zygote into the uterus
• C. Embryo with 16 blastomeres into the fallopian tube
• D. Ovum into the fallopian tube

Answer 1

The Correct Option is A

In vitro fertilization (IVF) is a type of assisted reproductive technology (ART) that involves the fertilization of an egg outside the woman's body. Let's analyze the question and options provided to explain the correct answer.

1. Understanding the process:
   • In vitro fertilization (IVF): This process involves combining an egg and sperm in a laboratory dish to create a zygote (fertilized egg). Depending on the development, this zygote or further developed embryo is then transferred into the woman's uterus or fallopian tube.
2. Option Analysis:
   • Zygote into the fallopian tube: This is a technique known as Zygote Intrafallopian Transfer (ZIFT). In ZIFT, the zygote is transferred into the fallopian tube. This matches the correct IVF process described, as the transfer involves the early stage of the fertilized egg.
   • Zygote into the uterus: This is not the typical procedure for IVF. Instead, it involves a more developed embryo (typically at the blastocyst stage) being transferred into the uterus.
   • Embryo with 16 blastomeres into the fallopian tube: This refers to an embryo at a more advanced stage of development (around the morula stage), which is usually not the stage transferred into the fallopian tubes but rather into the uterus in procedures like IVF or embryo transfer (ET).
   • Ovum into the fallopian tube: Transferring an unfertilized ovum directly into the fallopian tube is not part of the IVF process. Ovum is typically retrieved for fertilization outside the body in IVF.
3. Conclusion: The correct answer is Zygote into the fallopian tube, which corresponds to the ZIFT process, a less common procedure under the IVF umbrella.