Cu ions released from copper-releasing Intra Uterine Device (IUDs) dose not cause

Options

A. Make uterus unsuitable for implantation
B. Increase phagocytosis of sperms
C. Suppress sperm motility
D. Prevent ovulation

Answer

To solve the question regarding the effects of copper ions released from copper-releasing intrauterine devices (IUDs), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Intrauterine Devices (IUDs)**:
- IUDs are contraceptive devices that are inserted into the uterus to prevent pregnancy. They can be hormonal or non-hormonal (like copper-releasing IUDs).

2. **Functions of Copper-Releasing IUDs**:
- Copper ions released from these IUDs have several contraceptive effects:
- **Increase Phagocytosis of Sperm**: Copper ions enhance the immune response in the uterus, leading to increased phagocytosis of sperm.
- **Suppress Sperm Motility**: The presence of copper can hinder the movement of sperm, reducing their ability to reach and fertilize an egg.
- **Make Uterus Unsuitable for Implantation**: The copper ions create an environment in the uterus that is not conducive to implantation of a fertilized egg.

3. **Identifying the Incorrect Function**:
- The question asks which of the following does NOT occur due to copper ions from IUDs:
- **Prevent Ovulation**: This is primarily a function of hormonal contraceptives, not copper-releasing IUDs. Copper IUDs do not prevent the release of the ovum (egg); they mainly work by affecting sperm and the uterine environment.

4. **Conclusion**:
- Therefore, the correct answer is that copper ions released from copper-releasing IUDs do not prevent ovulation.

### Final Answer:
- **The correct option is: Prevent Ovulation**.