What happens to semen after a vasectomy?

The semen after a vasectomy has practically not changed. Although the sperm pathway is blocked after this operation, men still ejaculate the same amount of semen as they would have before the surgery. The only difference is that sperm will no longer be found within this semen.

During a vasectomy, the vas deferens, or tube that runs from the testicles to the tip of the penis, is blocked at the entrance so sperm can't move. Since the semen is not usually added to the sperm until it has gone further up this tube, the exit of the semen is not blocked. This allows a man to function sexually and ejaculate normally.

The testicles still create sperm after surgery, and they are then absorbed by the body. Semen after a vasectomy comes out as usual. It may still contain sperm that was already present in the vas deferens prior to surgery for several months after the operation. For this reason, couples are encouraged to use a backup method of contraception until the man is confirmed to be infertile.

To determine the sterility of semen after a vasectomy, it is tested at set intervals to obtain a sperm count. At first, several thousand sperm cells can still be found. This number should be reduced with each check until the count eventually reaches zero. In some cases, the vasectomy may not have been successful. If the tube isn't blocked properly, sperm can still get through.

Although the sperm count within semen after a vasectomy should be zero, occasionally the tubes can grow back together without a man's knowledge. This means that you may be able to impregnate your partner during intercourse. A man can also have his vasectomy reversed. The success of such an operation varies widely from person to person.

Vasectomies are relatively routine operations and there are usually no long-term side effects, other than sterility. Pain may occur for a day or so after the surgery is done, but this is usually mild and goes away quickly. Although rare, there are risks with any operation. These may include a negative reaction to local anesthesia and swelling of the testicles. Very rarely, sperm that are reabsorbed into the body after a vasectomy can cause an allergic reaction.

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