Reversible inhibition of sperm under guidance

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Reversible inhibition of sperm under guidance (RISUG) is a long-term, reversible male contraceptive method that involves the injection of a polymer gel into the vas deferens. This method is designed to provide a non-hormonal, reversible alternative to vasectomy.

Mechanism of Action

RISUG works by injecting a polymer gel, typically made of styrene and maleic anhydride, into the vas deferens. The gel coats the inner walls of the vas deferens and disrupts the sperm, rendering them immotile and unable to fertilize an ovum. The procedure is minimally invasive and can be performed under local anesthesia.

Procedure

The RISUG procedure involves the following steps:

1. The patient is given a local anesthetic to numb the area.
2. A small incision is made in the scrotum to access the vas deferens.
3. The polymer gel is injected into the vas deferens using a specialized syringe.
4. The incision is closed with sutures.

The entire procedure typically takes about 15-20 minutes and does not require hospitalization.

Reversibility

One of the key advantages of RISUG is its reversibility. The gel can be flushed out of the vas deferens using an injection of a solution, such as sodium bicarbonate, which dissolves the polymer and restores fertility. This makes RISUG a potentially attractive option for men who desire long-term contraception but may want to father children in the future.

Efficacy and Safety

Clinical trials have shown that RISUG is highly effective in preventing pregnancy, with a success rate comparable to that of vasectomy. The method has been tested in several countries, including India, where it has undergone extensive clinical trials. Side effects are generally minimal and may include mild pain or swelling at the injection site.

Advantages

• Long-term contraception with a single procedure
• Reversible
• Non-hormonal
• Minimal side effects
• Cost-effective

Disadvantages

• Requires a minor surgical procedure
• Not widely available outside of clinical trials
• Reversal procedure may not be 100% effective in all cases

Current Status

As of now, RISUG is still undergoing clinical trials in various countries and has not yet received widespread regulatory approval. Researchers continue to study its long-term efficacy, safety, and reversibility.

See Also

• Vasectomy
• Male contraception
• Contraceptive methods
• Sperm
• Ovum

External Links

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