Average failure rate of intrauterine contraceptive device is

Options

A. 0.23
B. 0.2
C. 0.01
D. 0.04

Answer

To determine the average failure rate of an intrauterine contraceptive device (IUD), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of IUDs**:
- Intrauterine devices are contraceptive devices inserted into the uterus. They work by creating an environment that is hostile to sperm, thereby preventing fertilization.

2. **Mechanism of Action**:
- IUDs increase the phagocytosis of sperm in the uterus, suppress sperm motility, and reduce the sperm's ability to fertilize an egg. Some IUDs release copper ions or hormones that further enhance their contraceptive effect.

3. **Recognize the Failure Rate**:
- Despite their effectiveness, no contraceptive method is 100% foolproof. The failure rate of IUDs indicates the percentage of women who may become pregnant while using this method.

4. **Identify the Average Failure Rate**:
- According to the information provided, the average failure rate of an intrauterine contraceptive device is approximately 0.04%.

5. **Conclude the Answer**:
- Therefore, the average failure rate of an intrauterine contraceptive device is 0.04%.

### Final Answer:
The average failure rate of an intrauterine contraceptive device (IUD) is 0.04%.

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