How to Kill Sperm After Sex

After intercourse, some fluid may flow out of the vagina. This is called semen and contains sperm cells, which can fertilize a female egg, leading to pregnancy.

Although many home remedies claim to flush out sperm after sex, these methods do not work. Douching, putting lemon juice in the vagina, and even urinating don’t kill sperm or prevent pregnancy.


Douching involves spraying a liquid solution directly up into the vagina after sex. Although it is commonly used to clean this area, doctors advise against it because it can disrupt the delicate balance of bacteria inside the vagina and alter its pH level, increasing the risk for sexually transmitted infections (STIs) [1]. Douching also does not stop pregnancy because sperm can enter the fallopian tubes in less than 2 minutes after sexual intercourse.

Men should avoid wearing tight pants like bike shorts, leather or slim jeans because they can trap heat near the testes and overheat them, which reduces sperm count. They should also take a warm shower rather than a hot bath after sex to wash away sperm, which can survive only in water that is 98 degrees Fahrenheit or warmer [2].

Removing Semen

Leaving sperm around can lead to stains and smells on clothing and furniture, as well as increase the risk of sexually transmitted infections or unwanted pregnancies. It’s important to clean up any semen that may have leaked from the vagina or sex toys quickly and thoroughly.

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Urinating after sex may help to remove some sperm, but it won’t kill them all. It is also important to use lubricants when having sex, as these can help prevent the leakage of semen.

Some people suggest having a shower, bath or using vinegar to wash away semen – This quote comes directly from the service However, these methods are not scientifically proven to kill sperm after sex. Depending on the person, the amount of semen produced and its consistency can vary significantly. Semen is often a sticky and jelly-like substance that can dry onto fabric or surfaces if it’s not wiped away.

Many people believe that vigorous physical activity can flush sperm out of the body. However, this is not proven to be effective and can actually cause a person to become pregnant if it’s done during the fertile window. It’s best to avoid any activities that involve the abdomen until after sex and when the body is fully rested.

Vaginal Cleansing

Despite the myriad of products that promise to wash, spray, steam, or otherwise clean your vulva, women’s internal genitalia (called the labia minora and majora) are naturally self-cleaning. But washing the vulva can disrupt this natural pH balance, leaving you more susceptible to sexually transmitted infections like STIs and UTIs and vaginal yeast infections like BV.

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If you must wash, do so with warm water and a mild or unscented soap. Separate the labia, and make sure the warm soapy water gets all around the clitoral hood and in between the skin folds. And remember to rinse thoroughly!

Avoid squirting water or solution into the vulva, as this can introduce bacteria and lead to irritation. And don’t use douches or other vaginal “douchers”—they can do more harm than good, as they can reduce the number of healthy bacteria that protect against infections and odors.

Instead of douching, shower or bathe daily with warm water and a gentle all-natural cleanser. After you’re done, be sure to wipe from front to back to prevent the spread of fecal bacteria, which can cause a urinary tract infection. Also, wear loose, breathable cotton underwear—thongs in particular can collect and hold moisture and encourage the growth of odor-producing bacteria. And, most importantly, always use a condom during penetrative sex to protect against STIs and pregnancy.


Spermicide contains nonoxynol-9, which kills or weakens sperm. It is available over the counter in several forms, including gels, foams and tablets. It is important to follow the instructions on the label carefully and use it only for the purpose for which it was prescribed, since too much spermicide can cause toxic shock syndrome or a urinary tract infection. It can be purchased at most drugstores, some supermarkets and family planning clinics. It is also covered by Family PACT, a low-cost birth control program offered through Planned Parenthood.

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To use spermicide, insert it deep into the vagina before having sex and leave it in place for up to an hour. The exact time that it takes to work varies from one type to the next, so read the product instructions closely. The spermicide can be applied with your fingers or with the applicator included in the package.

When used correctly, spermicide can be an effective way to prevent pregnancy without hormones. However, it does not protect against sexually transmitted infections, so it is important to use a barrier method, like condoms, in addition to spermicide. Also, spermicide may cause irritation or itching and should not be used as the sole contraceptive method for women with health concerns or who are at risk of STIs.

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