hi i was wonder what the chances of pregnancy was in this situation; unprotected sex for no more the n 15 seconds ? this wwas after 2 previous urinations and the penis was withdrawn well befor ejaculation was goin to happen. i say this b/c i was told by a health care proffessional that sperm cant survive in the ph of urine thus this would prevent the pre ejaculation from containing any viable sperm...so i was wondering if this is the case in this situation and what the chances for pregnancy are?