Why the coitus interruptus method shows very high failure rate ?

Options

A. Coitus interruptus is not possible
B. Initial secretion in male, may also contain sperms
C. Capacitation occurs in vagina
D. None of the above

Answer

### Step-by-Step Solution

1. **Understanding Coitus Interruptus**:
- Coitus interruptus, also known as the withdrawal method, is a contraceptive technique where the male partner withdraws his penis from the vagina before ejaculation to prevent sperm from entering the female reproductive tract.

2. **Mechanism of Action**:
- The primary intention of this method is to avoid fertilization by ensuring that sperm does not reach the egg. The male partner aims to pull out before ejaculation occurs.

3. **High Failure Rate Explanation**:
- The failure rate of the coitus interruptus method is notably high due to several factors. One significant reason is that pre-ejaculatory fluid (also known as pre-cum) can be released before ejaculation.

4. **Presence of Sperm in Pre-ejaculatory Fluid**:
- This pre-ejaculatory fluid can sometimes contain sperm from previous ejaculations that may have remained in the urethra. If this fluid enters the vagina, it can lead to fertilization, resulting in an unintended pregnancy.

5. **Conclusion**:
- Therefore, the high failure rate of the coitus interruptus method is primarily due to the possibility of sperm being present in the initial secretions of the male, which can lead to fertilization despite the withdrawal attempt.

### Final Answer
The coitus interruptus method shows a very high failure rate because the initial secretions in males may contain sperm, which can enter the vagina and lead to fertilization.

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