Condoms are thin pouches that keep sperm from getting into the vagina. There are male condoms and female condoms:. Condoms work by keeping semen the fluid that contains sperm from entering the vagina. The male condom is placed on the penis when it becomes erect. It is unrolled all the way to the base of the penis while holding the tip of the condom to leave some extra room at the end. This creates a space for semen after ejaculation and makes it less likely that the condom will break.
The lifespan of sperm cells: Longevity, withdrawal, and fertility
The male condom is a thin cover that fits over a man's erect penis. Condoms are made of:. Condoms are the only method of birth control for men that are not permanent. They can be purchased at most drugstores, in vending machines in some restrooms, by mail order, and at certain health care clinics.
Update: A previous version of this article contained quotes from an expert whose credentials are now in question. We have reached out to him for confirmation of those credentials and have not heard back. You can read Gizmodo's investigation here , and his response here. Most people with penises produce between 39 million to million sperm per ejaculation, according to the World Health Organization.
Pregnancy is possible whenever semen is in or on the vagina. But getting pregnant by wiping is unlikely, especially if the semen is not fresh or only a small amount enters the vagina. However it happens, if fresh semen enters the vagina of a person who can conceive, pregnancy becomes a possibility. This article investigates the chances of pregnancy occurring in this way, how to reduce the odds, early signs of pregnancy, and more. Pregnancy is very unlikely if a person wipes semen on the outside of the vagina — the vulva.