Average failure rate of intrauterine contraceptive device is

Options

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

Answer

To solve the question regarding the average failure rate of intrauterine contraceptive devices (IUCDs), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the average failure rate of intrauterine contraceptive devices (IUCDs).

2. **Define IUCD**: Intrauterine contraceptive devices are T-shaped devices that are inserted into the uterus to prevent pregnancy. They can be made of copper or can be hormone-coated.

3. **Mechanism of Action**: IUCDs work through various mechanisms:
- They can have a spermicide effect, killing sperm.
- They create an inflammatory reaction in the uterus.
- They can suppress sperm motility.
- They prevent implantation of a fertilized egg.

4. **Effectiveness of IUCDs**: Like all contraceptive methods, IUCDs are not 100% effective. They have a failure rate, which is the percentage of women who become pregnant while using the device.

5. **Identify the Failure Rate**: The average failure rate of IUCDs is known to be 0.04. This means that 4 out of 100 women using an IUCD may become pregnant within a year of use.

6. **Select the Correct Answer**: Among the given options (0.23, 0.2, 0.01, 0.04), the correct answer is 0.04.

### Final Answer:
The average failure rate of intrauterine contraceptive devices (IUCDs) is **0.04**.

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