In which of the following methods zygote upto 32 blastomeres is transferred into the uterus ?

Options

A. IUT
B. ZIFT
C. GIFT
D. ICSI

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the method in which a zygote, specifically at the 32 blastomere stage, is transferred into the uterus.

2. **Identifying the Process**: The relevant process here is In Vitro Fertilization (IVF), where fertilization occurs outside the body in a controlled laboratory environment.

3. **Zygote Development**: After fertilization, the zygote begins to divide. The number of cells (blastomeres) increases as the zygote develops. The question specifies the transfer of a zygote that has reached the 32 blastomere stage.

4. **Transfer Method**: The transfer of the zygote into the uterus occurs when the zygote has developed beyond 8 blastomeres. Specifically, for a zygote with 32 blastomeres, this transfer is referred to as **intrauterine transfer**.

5. **Differentiating Other Techniques**:
- ZIFT (Zygote Intrafallopian Transfer) is used for zygotes with fewer than 8 blastomeres and involves transferring them to the fallopian tube.
- GIFT (Gamete Intrafallopian Transfer) involves transferring gametes (sperm and ovum) to the fallopian tube, typically used when a female cannot produce viable ova.
- Intracytoplasmic Sperm Injection (ICSI) is a technique where a single sperm is injected directly into an ovum, used in cases of male infertility.

6. **Conclusion**: Based on the above information, the correct answer to the question is that the zygote with up to 32 blastomeres is transferred into the uterus using the method known as **intrauterine transfer**.

**Final Answer**: Intrauterine transfer (Option 1).

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