Which of the following approaches does not give the defined action of contraceptive?

Options

A. Intra uterine devices-Increase phagocytosis of sperms, suppress sperm motility and fertilizing capacity of sperms
B. Hormonal contraceptives- Prevent-retard entry of sperms, prevent ovulation & fertilization
C. Vasectomy-Prevents spermatogenesis
D. Barrier methods-prevent fertilization

Answer

**Step-by-Step Solution:**

1. **Understanding Contraceptives**: Contraceptives are methods used to prevent pregnancy. They work by preventing the fusion of male and female gametes, inhibiting ovulation, or preventing implantation of a fertilized egg.

2. **Analyzing Options**:
- **IUDs (Intrauterine Devices)**: These devices increase the phagocytosis of sperm, thereby preventing fertilization.
- **Hormonal Contraceptives**: These methods, which often contain progesterone, prevent ovulation and thus fertilization.
- **Vasectomy**: This surgical procedure involves cutting and ligating the vas deferens, preventing sperm from being included in the semen. This effectively prevents spermatogenesis.
- **Barrier Methods**: These methods physically block sperm from reaching the egg, thus preventing fertilization.

3. **Identifying the Incorrect Approach**: The question asks for the approach that does not give the defined action of a contraceptive.
- While IUDs, hormonal contraceptives, and barrier methods all effectively prevent fertilization, vasectomy prevents the formation of sperm, which is not the same as preventing fertilization directly.

4. **Conclusion**: The approach that does not give the defined action of a contraceptive is **vasectomy**, as it prevents the formation of sperm rather than preventing fertilization.

**Final Answer**: The approach that does not give the defined action of contraceptive is **C. Vasectomy**.

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