Which of the following is an additional advantages of hormone releasing IUDs?

Options

A. Increase phagocytosis of sperms
B. Suppress sperm motility and the fertiliising capacity of spems.
C. They make the uterus unsuitable for implantation and cervix hostile to the sperms
D. They always inhibit ovulation.

Answer

### Step-by-Step Solution:

1. **Understanding IUDs**:
- IUD stands for Intrauterine Device, which is a form of contraception inserted into the uterus to prevent pregnancy.

2. **Types of IUDs**:
- There are two main types of IUDs:
- **Copper-releasing IUDs**: These release copper ions which create an environment that is toxic to sperm.
- **Hormone-releasing IUDs**: These release hormones (usually progestin) that alter the uterine environment.

3. **Identifying the Advantages of Hormone-releasing IUDs**:
- The question asks for an additional advantage of hormone-releasing IUDs specifically.

4. **Evaluating the Options**:
- **Option 1**: Increased phagocytosis of sperms - This is an advantage of IUDs in general but not specific to hormone-releasing IUDs.
- **Option 2**: Suppress sperm motility and fertilizing capacity of sperms - This is an advantage of copper-releasing IUDs, not hormone-releasing ones.
- **Option 3**: They make the uterus unsuitable for implantation and cervix hostile to the sperms - This is a correct advantage of hormone-releasing IUDs.
- **Option 4**: They always inhibit ovulation - This is an advantage of contraceptive pills, not IUDs.

5. **Conclusion**:
- The correct answer is that hormone-releasing IUDs make the uterus unsuitable for implantation and cervix hostile to the sperms.

### Final Answer:
The additional advantage of hormone-releasing IUDs is that they make the uterus unsuitable for implantation and cervix hostile to the sperms.