A couple is unable to bear a child despite having unprotected coitus . They decided to have a test - tube bady. On being diagnosed, the the doctor advised them for a technique which requires the transfer of an embryo with more than 8 blastomeres. Identify the technique adopted by the couple.

Options

A. ICSl
B. IUT
C. ZIFT
D. Al

Answer

To solve the question about the couple who decided to have a test-tube baby and were advised to use a technique that involves the transfer of an embryo with more than 8 blastomeres, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Scenario**: The couple is unable to conceive naturally despite having unprotected intercourse. They are considering assisted reproductive technologies, specifically a test-tube baby.

**Hint**: Recognize the context of infertility and the need for assisted reproductive techniques.

2. **Identifying the Techniques**: The question provides several options related to assisted reproductive technologies:
- A) ICSI (Intracytoplasmic Sperm Injection)
- B) IUT (Intrauterine Transfer)
- C) ZIFT (Zygote Intra-Fallopian Transfer)
- D) All of the above

**Hint**: Familiarize yourself with the definitions of each technique mentioned.

3. **Analyzing the Requirement**: The doctor specifically mentioned that the technique requires the transfer of an embryo with more than 8 blastomeres. This detail is crucial for identifying the correct technique.

**Hint**: Recall the stages of embryo development and the significance of the number of blastomeres.

4. **Evaluating Each Technique**:
- **ICSI**: This technique involves injecting a single sperm into an egg. It does not specifically relate to the number of blastomeres transferred.
- **IUT**: Intrauterine Transfer involves the transfer of embryos into the uterus, typically at the blastocyst stage, which usually has more than 8 blastomeres.
- **ZIFT**: This technique involves transferring a zygote into the fallopian tube, which can also involve embryos with more than 8 blastomeres, but it is not the primary focus here.

**Hint**: Consider the specific requirements of each technique regarding the number of blastomeres.

5. **Conclusion**: Based on the analysis, the technique that specifically requires the transfer of an embryo with more than 8 blastomeres is **Intrauterine Transfer (IUT)**.

**Hint**: Confirm your choice by recalling the definitions and applications of the techniques.

### Final Answer:
The technique adopted by the couple is **Intrauterine Transfer (IUT)**.