LNG - 20 is a hormone - releasing IUD. It is called LNG - 20 because

Options

A. it releases levonorgestrel , a synthetic estrogen
B. it releases levoprogestrol , a synthetic estrogen
C. it releases levonorgestrel , a synthetic progesterone
D. it releases levoprogestrol , a synthetic progesterone

Answer

To solve the question regarding why LNG-20 is called as such, we need to analyze the components of the name and the function of the device.

### Step-by-Step Solution:

1. **Understanding LNG-20**:
- LNG-20 is an intrauterine device (IUD) that releases hormones. The "LNG" stands for levonorgestrel, which is a specific type of hormone.

**Hint**: Remember that "LNG" refers to a specific hormone used in this IUD.

2. **Identifying the Hormone**:
- Levonorgestrel is a synthetic form of progesterone, which is a hormone involved in the menstrual cycle and pregnancy. It is not an estrogen, which is important to note.

**Hint**: Differentiate between types of hormones; levonorgestrel is a synthetic progesterone, not estrogen.

3. **Understanding the "20"**:
- The "20" in LNG-20 refers to the amount of levonorgestrel released daily by the IUD, which is 20 micrograms.

**Hint**: The number indicates the dosage of the hormone released per day.

4. **Conclusion**:
- Therefore, LNG-20 is called so because it releases levonorgestrel, a synthetic progesterone, at a rate of 20 micrograms per day.

**Hint**: Focus on the components of the name: "LNG" for levonorgestrel and "20" for the daily release rate.

### Final Answer:
LNG-20 is called so because it releases levonorgestrel, a synthetic progesterone, at a rate of 20 micrograms per day.