The term test-tube baby implies that

Options

A. fertilisation of ovum takes place in the uterus, but it develops in the test-tube
B. fertilisation of ovum takes place in the test-tube and it develops in test-tube itself
C. fertilisation of ovum takes place in the test-tube, but it develops in the uterus
D. fertilisation of ovum takes place in the uterus and embryo develops in the uterus

Answer

To answer the question "The term test-tube baby implies that," we need to understand the concept of in vitro fertilization (IVF) and the process involved. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Definition of Test-Tube Baby**:
- The term "test-tube baby" refers to a baby that is conceived through a process called in vitro fertilization (IVF). This means that the fertilization of the egg (ovum) by the sperm occurs outside the female body.

**Hint**: Remember that "test-tube" indicates a laboratory setting where fertilization happens outside the body.

2. **Process of IVF**:
- In IVF, healthy ova (eggs) are collected from a donor mother, and sperm is collected from a donor father. These are then combined in a laboratory setting, typically in a test tube, to facilitate fertilization.

**Hint**: Focus on the fact that both the egg and sperm are sourced from donors and combined in a controlled environment.

3. **Fertilization Location**:
- The fertilization occurs in the test tube, which is a crucial distinction from natural fertilization that typically happens inside the female's reproductive system (in the fallopian tubes).

**Hint**: Keep in mind that the key aspect of IVF is that fertilization happens outside the body, not in the uterus.

4. **Development of the Zygote**:
- After fertilization, the zygote (the fertilized egg) is formed outside the female body. This zygote is then implanted into the uterus of the female for further development.

**Hint**: Zygote formation happens in the lab, but the development into a fetus occurs inside the uterus.

5. **Conclusion**:
- The correct implication of the term "test-tube baby" is that fertilization of the ovum takes place in the test tube, and then the embryo develops in the uterus.

**Hint**: The key takeaway is the separation of fertilization (in the lab) and development (in the uterus).

### Final Answer:
The correct option is: "The fertilization of ovum takes place in the test-tube and develops in the uterus."