Coitus interuptus method of birth control involves

Options

A. uterus
B. vasdeferens
C. withdrawal of penis just before male ejaculates
D. barrier method

Answer

### Step-by-Step Solution:

1. **Understanding Coitus Interruptus**: Coitus interruptus, also known as the withdrawal method, is a natural method of birth control. It involves the male partner withdrawing the penis from the female genital tract before ejaculation.

2. **Mechanism of Action**: The primary goal of this method is to prevent sperm from entering the female reproductive system. The male partner must be aware of the moment he is about to ejaculate and must withdraw in time to ensure that semen is deposited outside the female body.

3. **Characteristics of the Method**:
- It does not involve any medical intervention or devices.
- It relies on the self-control and timing of the male partner.
- It is considered a natural method of contraception.

4. **Exclusion of Other Methods**: Coitus interruptus does not involve any surgical methods, barrier methods (like condoms), or hormonal methods. It is purely based on behavioral control.

5. **Conclusion**: Therefore, the coitus interruptus method of birth control involves the withdrawal of the male partner before ejaculation to prevent sperm from entering the female reproductive tract.

### Final Answer:
Coitus interruptus method of birth control involves the withdrawal of the male partner before ejaculation.

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