In which one of the following techniques blastomeres up to 8 cell stage is introduced into the fallopian tube ?

Options

A. Intra cytoplasmic sperm injection (ICSI)
B. Intra uterine insemination (IUI)
C. Gamete intra fallopian transfer (GIFT)
D. Zygote intra fallopian transfer (ZIFT)

Answer

To solve the question regarding which technique involves the introduction of blastomeres up to the 8-cell stage into the fallopian tube, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Context**: The question is about assisted reproductive technologies (ART) and specifically which technique allows for the transfer of embryos (blastomeres) into the fallopian tube.

2. **Identify the Techniques**: The common ART techniques include:
- In Vitro Fertilization (IVF)
- Zygote Intra-Fallopian Transfer (ZIFT)
- Intra-Uterine Insemination (IUI)
- Intracytoplasmic Sperm Injection (ICSI)
- Gamete Intra-Fallopian Transfer (GIFT)

3. **Analyzing Each Technique**:
- **IVF**: Involves fertilization in the lab and transfer of the resulting zygote or embryo to the uterus, not the fallopian tube.
- **ZIFT**: Involves the transfer of a zygote (which can be at the 8-cell stage) directly into the fallopian tube.
- **IUI**: Involves placing sperm directly into the uterus, not the fallopian tube.
- **ICSI**: This is a method of fertilization where a single sperm is injected directly into an egg, and it does not involve transferring embryos to the fallopian tube.
- **GIFT**: Involves transferring gametes (sperm and eggs) into the fallopian tube, but does not involve the transfer of embryos.

4. **Conclusion**: The technique that specifically involves the introduction of blastomeres (embryos) up to the 8-cell stage into the fallopian tube is **Zygote Intra-Fallopian Transfer (ZIFT)**.

### Final Answer:
The correct answer is **Zygote Intra-Fallopian Transfer (ZIFT)**.

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