It's possible, but not likely.

Pre-cum or pre-ejaculatory fluid is released when a guy gets an erection. It cleans out the inside of the urethra, which is the tube that carries semen and urine out of the penis.

The fluid makes the urethra less acidic and gives the sperm a better shot at surviving the trip from the guy's testicles to the girl's fallopian tubes. There's usually NO sperm in pre-cum fluid.

But, if there are live sperm inside a guy's urethra (because he has ejaculated recently), the pre-cum can "pick up" the leftover sperm on its way through the urethra and out of the penis. If a guy pees after he ejaculates, that would kill leftover sperm.

So, say a guy has sex and cums at 9 p.m. He doesn't go to the bathroom after he has sex. At 10 p.m., he gets another erection and pre-cum fluid is released. That can have live sperm in it. Is it enough sperm to get a girl pregnant? Possible, but not probable.

But pre-cum can carry sexually transmitted diseases, so a guy should put on a condom as soon as he gets an erection.

If you want to make an appointment at a family planning clinic to be tested for pregnancy and/or STDs, to get emergency contraception, or to get a reliable method of birth control, you can find one in your area by looking in your local yellow pages under "family planning" or "clinics." You can click here to find a clinic near you, or call 1-800-230-PLAN to be connected automatically to the Planned Parenthood health center nearest you.