What is the function of non-medicated IUD?

Options

A. To inhibit ovulation
B. To inhibit fertilization
C. To inhibit implantation of blastocyst
D. To inhibit gametogenesis

Answer

### Step-by-Step Solution:

1. **Understanding IUD**:
- IUD stands for Intrauterine Device, which is a contraceptive device inserted into the uterus to prevent pregnancy.

2. **Types of IUDs**:
- There are two main types of IUDs: medicated and non-medicated. Non-medicated IUDs do not contain any hormones or chemicals.

3. **Function of Non-Medicated IUD**:
- The primary function of a non-medicated IUD is to prevent pregnancy through a physical mechanism rather than a chemical one.

4. **Mechanism of Action**:
- Non-medicated IUDs create a mild inflammatory response in the uterus. This inflammation leads to scarring of the uterine lining.

5. **Impact on Pregnancy**:
- The scarring and inflammation prevent the implantation of a fertilized egg (blastocyst) in the uterus. Without successful implantation, a placenta cannot form, and therefore, a pregnancy cannot occur.

6. **Conclusion**:
- Thus, the function of non-medicated IUDs is to inhibit implantation of the blastocyst, which effectively prevents pregnancy.