What is the function of IUD's?

Options

A. Inhibit ovulation
B. Increase phagocytosis of sperm
C. Inhibit fertilization
D. None of the above

Answer

### Step-by-Step Solution:

1. **Understanding IUDs**:
- IUD stands for Intrauterine Device. It is a form of contraception that is inserted into the uterus.

2. **Primary Function**:
- The main function of IUDs is to provide protection against pregnancy. They are designed to prevent fertilization and implantation of an egg.

3. **Mechanism of Action**:
- IUDs work primarily by increasing the phagocytosis of sperm. This means that they help in the destruction of sperm cells, making them incapable of fertilizing an egg.

4. **Material Composition**:
- Many IUDs are made of copper, which plays a crucial role in their effectiveness. Copper ions released from the IUD create an environment that is toxic to sperm, thus reducing their motility and viability.

5. **Inhibition of Ovulation**:
- It is important to note that IUDs do not inhibit ovulation. Ovulation is a natural process that occurs in a monthly cycle, and IUDs do not interfere with this cycle.

6. **Conclusion**:
- The correct function of IUDs is to increase the phagocytosis of sperm, thereby preventing fertilization and subsequent pregnancy.