'Test Tube ' bady refers to -

Options

A. A body born in test tube
B. An ovum made to fertilise in - vitro and then implanted in the uterus
C. A method of tissue culture
D. None

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Test Tube Baby":**
- The term "test tube baby" refers to a baby that is conceived through a specific medical procedure known as In Vitro Fertilization (IVF).

2. **Defining In Vitro Fertilization (IVF):**
- IVF is a process where fertilization occurs outside the human body, typically in a laboratory setting. The term "in vitro" means "in glass," which is why it is colloquially referred to as "test tube" baby, even though the actual fertilization may not occur in a test tube.

3. **The IVF Process:**
- In IVF, eggs (ova) are collected from a woman's ovaries and sperm is collected from a male. The sperm is then used to fertilize the eggs in a controlled environment, creating embryos.

4. **Embryo Transfer:**
- After fertilization, the resulting embryos are monitored for development. One or more healthy embryos are then selected and transferred into the woman’s uterus or fallopian tubes. This transfer can be referred to as Zygote Intra Fallopian Transfer (ZIFT) if the zygote is placed in the fallopian tube.

5. **Conclusion:**
- A "test tube baby" is thus a baby that is conceived through the IVF process, where fertilization occurs outside the body and the embryo is later implanted in the uterus for further development.

### Final Answer:
- A test tube baby refers to a baby conceived through In Vitro Fertilization (IVF), where the fertilization of the egg occurs outside the body and the embryo is implanted in the uterus.