In the IVF technique , which of the following is transferred into the fallopian tube ?

Options

A. Zygote
B. Embryo upto 8 blastomere stage
C. Embryo in 32 cell stage
D. Either (A) or (B)

Answer

To solve the question regarding the IVF technique and what is transferred into the fallopian tube, we can follow these steps:

### Step-by-Step Solution:

1. **Understand IVF Technique**: In Vitro Fertilization (IVF) is a process where eggs are fertilized by sperm outside the body, typically in a laboratory setting.

**Hint**: Remember that IVF involves fertilization occurring outside the body.

2. **Egg Collection**: During IVF, mature eggs are collected from the ovaries of the female.

**Hint**: Focus on the initial step of IVF where eggs are harvested.

3. **Fertilization**: The collected eggs are then fertilized by sperm in the lab, resulting in the formation of a zygote.

**Hint**: Think about the role of sperm in fertilizing the eggs.

4. **Development of the Zygote**: After fertilization, the zygote begins to divide and develop. It typically reaches an 8-cell stage (also known as the 8-cell embryo) before being transferred.

**Hint**: The zygote develops into an embryo, and the specific stage we are interested in is the 8-cell stage.

5. **Transfer to Fallopian Tube**: In IVF, the zygote or the embryo at the 8-cell stage is then transferred into the fallopian tube for further development.

**Hint**: Identify which stage of the embryo is transferred to the fallopian tube.

6. **Evaluate Options**:
- Option A: Zygote - Correct, as it is transferred.
- Option B: Embryo up to the 8-cell stage - Correct, as it is also transferred.
- Option C: Embryo in the 32-cell stage - Incorrect, as this stage is not transferred.
- Option D: Either A and B - Correct, since both A and B are valid.

7. **Conclusion**: The correct answer is that either the zygote or the embryo up to the 8-cell stage is transferred into the fallopian tube.

**Final Answer**: The correct options are A (Zygote) and B (Embryo up to the 8-cell stage), which corresponds to option D (Either A and B).

### Summary:
In the IVF technique, the zygote or the embryo at the 8-cell stage is transferred into the fallopian tube. Therefore, the answer is option D: Either A and B.