A new birth control method for men known as RISUG for Reversible Inhibition of Sperm Under Guidance is under testing. The procedure involves injection of a nontoxic polymer inside of the vas deferens. The polymer forms a coating on the inner lining of vas deferens. As sperms pass through, they are chemically disabled by the polymer. Hence, there is ejaculation but the sperms are incapable of fertilising the egg. At any stage if needed, the polymer film can be dissolved and removed using specific injections.
In another birth control method vasectomy, a small part of the vas deferens is removed or tied up. What advantage does RISUG give over vasectomy?

Options

A. It can be performed on males of any age.
B. It does not involve the female partner of the male.
C. It is being tested currently and hence more reliable.
D. It allows the male to go back to the fertile state whenever needed.

Answer

**Step-by-Step Solution:**

1. **Understanding the Methods**: Begin by understanding the two birth control methods being compared: RISUG (Reversible Inhibition of Sperm Under Guidance) and vasectomy. RISUG involves injecting a non-toxic polymer into the vas deferens, which disables sperm but allows ejaculation. Vasectomy involves cutting or tying the vas deferens, preventing sperm from entering the urethra.

2. **Mechanism of Action**: Analyze how each method works. In RISUG, the polymer coats the vas deferens and chemically disables the sperm, allowing for ejaculation without the possibility of fertilization. In contrast, vasectomy physically prevents sperm from being released.

3. **Reversibility**: The key difference lies in reversibility. RISUG is designed to be reversible; the polymer can be dissolved and removed, allowing a man to regain fertility if desired. Vasectomy, on the other hand, is typically considered a permanent method, as once the vas deferens is cut or tied, it usually requires surgical intervention to reverse.

4. **Advantages of RISUG**: Highlight the advantages of RISUG over vasectomy:
- **Reversible**: Men can regain fertility after the procedure if they choose to.
- **Less invasive**: The procedure involves injection rather than surgery, which may have fewer risks and complications.

5. **Conclusion**: Summarize that the main advantage of RISUG over vasectomy is its reversibility, allowing men to return to a fertile state if they decide to have children in the future.

**Final Answer**: The main advantage of RISUG over vasectomy is that RISUG is a reversible method, allowing men to regain fertility if desired, whereas vasectomy is typically irreversible.

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