In the production of a test-tube baby,

Options

A. fertilization is done outside body
B. foetus is grown in a test tube
C. fertilization is done inside body
D. none of these

Answer

To solve the question regarding the production of a test-tube baby, we need to understand the process involved in in vitro fertilization (IVF). Here’s a step-by-step breakdown:

### Step-by-Step Solution:

1. **Understanding Test-Tube Baby**: A test-tube baby refers to a baby conceived through a process called in vitro fertilization (IVF), where fertilization occurs outside the human body.

2. **In Vitro Fertilization (IVF)**: In IVF, the male and female gametes (sperm and egg) are collected and combined in a laboratory setting. This process is done outside the body, which is a key characteristic of IVF.

3. **Fertilization Process**: The male gamete (sperm) and the female gamete (egg) are fused together in a controlled environment. This fusion results in the formation of a zygote.

4. **Development of the Zygote**: After the zygote is formed, it undergoes several divisions. The first division leads to the formation of a morula, which is a solid ball of cells.

5. **Formation of Blastocyst**: The morula continues to divide and eventually develops into a blastocyst. This stage is crucial for implantation into the uterus.

6. **Transfer to the Uterus**: Once the blastocyst is formed, it is then transferred into the uterus of the female, where it can implant and develop into a fetus.

7. **Conclusion**: Therefore, the correct answer to the question is that in the production of a test-tube baby, fertilization is done outside the body.

### Final Answer:
Fertilization is done outside the body.

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