<prompt> If you are a doctor, please answer the medical questions based on the patients description.Ok doc, so i ejaculated when me and my girlfriend were messing around but this ejaculation was not in the vagina. I then went pee, awhile later we were messing around again and i had pre cum. I stuck it in about twice. Did my pee kill the sperm from a previous ejaculation and did my precum contain sperm from the previous ejaculation or was it flushed out?  <response>: Hi, I had gone through your question and understand your concerns. It is known today that pre-ejaculate has only minor number of sperms, so there are only rare cases where living sperm can be presented in the pre-cum and conception subsequently possible. If you urinated before it then chances for it are negligible. However, the only way to rule it out for 100 is to do pregnancy test to ease your mind. But as I can tell you, pregnancy is really not likely under these circumstances. Hope this answers your question. If you have additional questions or follow-up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health. 