Which of the following contraceptive method make uterus unsuitable for implantation ?

Options

A. Diaphram
B. Condom
C. IUD
D. Natural method

Answer

To determine which contraceptive method makes the uterus unsuitable for implantation, we can analyze the options provided: diaphragm, condom, IUD, and natural method.

### Step-by-Step Solution:

1. **Understand Implantation**:
- Implantation is the process where a fertilized zygote embeds itself into the lining of the uterus (endometrium). This is crucial for the development of the embryo and the formation of the placenta.

2. **Identify Contraceptive Methods**:
- The methods listed are diaphragm, condom, IUD, and natural method. Each of these has a different mechanism of action in preventing pregnancy.

3. **Analyze Each Method**:
- **Diaphragm**: This is a barrier method that prevents sperm from entering the uterus but does not alter the uterine lining.
- **Condom**: This is also a barrier method that prevents sperm from reaching the egg. It does not affect the uterine environment.
- **IUD (Intrauterine Device)**: This is a device inserted into the uterus. It creates an environment that is unsuitable for implantation by affecting the uterine lining and preventing fertilization.
- **Natural Method**: This involves tracking fertility cycles and does not interfere with the uterine environment.

4. **Conclusion**:
- Among the options, the IUD is specifically designed to make the uterus unsuitable for implantation, thereby preventing pregnancy.

### Final Answer:
The contraceptive method that makes the uterus unsuitable for implantation is **IUD (Intrauterine Device)**.