A vasectomy prevents :

Options

A. Producation of sperms in testes
B. Producation of semen
C. Movement of sperm into urethra
D. male erection

Answer

### Step-by-Step Solution:

1. **Understanding Vasectomy**:
- Vasectomy is a surgical procedure aimed at male sterilization. It involves cutting and tying the vas deferens, which is the tube that carries sperm from the testicles to the urethra.

2. **Function of Vas Deferens**:
- The vas deferens plays a crucial role in the male reproductive system by transporting sperm from the testis to the urethra, where it is mixed with seminal fluid to form semen.

3. **Effect of Vasectomy**:
- After a vasectomy, the vas deferens is no longer able to transport sperm. This means that sperm cannot reach the urethra and therefore cannot be ejaculated during sexual intercourse.

4. **Implications of Vasectomy**:
- As a result of this procedure, the male becomes sterile, meaning he cannot father children. This is why vasectomy is often considered a permanent method of contraception.

5. **Analyzing the Options**:
- The question asks what a vasectomy prevents. The options provided include:
- A) Production of sperm in the testis
- B) Production of semen
- C) Movement of sperm into the urethra
- D) Male erection

6. **Identifying the Correct Answer**:
- The correct answer is **C) Movement of sperm into the urethra**. This is because the vas deferens, which is responsible for this movement, is cut and tied during the procedure.

### Final Answer:
A vasectomy prevents the movement of sperm into the urethra.

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