![]() ![]() That means the moment they have an erection, according to the CDC. Saunders, M.D., an ob/gyn with Banner University Medicine Women's Institute, tells SELF. If you’re using an external condom with a person who has a penis, they should put on the condom before any kind of fluid can escape, Kelley T. External condoms, which respectively have a typical and perfect use failure rate of 18 and 2 percent, might be a better option. This means that if you’re worried about pregnancy, the pull-out method may not be for you. It’s that it can be really hard to use the pull-out method perfectly instead of typically. So, the issue with the withdrawal method isn’t that precum inherently contains a bunch of sperm that can get you pregnant. It’s also typically pretty hard for a dribble of precum to pull off. The amount of biological magic involved is kind of mind-blowing. The person with the vagina must have released an egg for potential fertilization (or be on the edge of doing so), that egg must be viable enough for conception, it must meet viable enough sperm, and that fertilized egg then needs to latch onto the uterine lining. Again, that’s people who are fully trying to get pregnant! This is because getting pregnant requires a specific and complex chain of events to happen successfully. People in this group have around a 25 to 30 percent chance of getting pregnant during each menstrual cycle, according to the American College of Obstetricians and Gynecologists (ACOG). To help put it into perspective, consider couples in their 20s and 30s who are actively trying to conceive by allowing full ejaculation into the vagina multiple times. ![]() This makes sense when you think about it. There aren't any hard numbers as to how often precum carries sperm from the urethra into the vagina and causes a pregnancy, but it seems to be quite rare. Neither scenario changes anything about the trajectory of conception or the pregnancy itself, and there aren’t any medical tests that can suss out whether or not someone got pregnant because precum picked up sperm or because a bit of ejaculate got into the vagina before the person with the penis pulled out. It’s pretty impossible to determine if a pregnancy is the result of precum or the result of actual ejaculate getting into a vagina. This DIY birth control method relies on the person with the penis yanking themselves out of the person with the vagina right before ejaculation in order to minimize the risk of pregnancy. ![]() The question of sperm in precum usually comes up in reference to the pull-out method, also known as the withdrawal method (and coitus interruptus-sounds like a dinosaur, but OK). If you’re relying on the pull-out method, precum isn’t really the issue-it’s human error. It’s possible that this lowered the overall number of sperm found in their samples. With that said, the Human Fertility study authors also note that they only asked participants to collect a drop of their precum, not all of it. Less than 2.5 percent of those people had fewer than 23 million sperm in their ejaculatory fluid. The researchers point to a 2010 World Health Organization study of 1,953 people with penises who had gotten their partners pregnant within a year of trying to conceive. That sounds like a ton of the stuff, but it’s not. The study authors also note that all but one of the precum samples had fewer than 23 million sperm. (Remember, pre-ejaculate doesn’t naturally contain semen on its own, so this means the precum samples containing sperm picked it up from the urethra on the way out of the body.) In that Human Fertility study, only 37 percent of the sperm-containing precum samples had a fair amount of motile sperm, as in, ones that could make the journey toward an egg. In general, precum doesn’t seem to transport top-notch sperm (no offense to the little wrigglers that wind up in this fluid). For instance, a 2013 study in Human Fertility examined 40 samples of precum and semen from 27 participants, finding that 41 percent of the participants produced precum samples that contained live sperm. There’s not a ton of research in this area (shocker), but the small scientific investigations that do exist generally indicate that precum can potentially harbor live sperm. “The likelihood of pregnancy is very low, but it’s never zero.” “Typically, it’s not enough for pregnancy,” Dr. ![]()
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