the typical fertile window is 3-5 days long and it is just before you ovulate. ovulation typically occurs about 14 days before the next menstrual period starts. so in a 30 day cycle ovulation should occur around day 16 and your fertile period is between cycle days 11-16. the fertile window is determined when the cervical mucous becomes more elastic and receptive to sperm. some women notice that is is more slippery when they wipe during this time. men need to ejaculate once within a week of the fertile window to increase the number of younger sperm that will be in the ejaculate during the fertile window and have intercourse at least once during the fertile window. the day the opk turns positive is probably the last day of the fertile window so i would try a little earlier. don't worry about the semen leaking out of the vagina. that is normal. only about 10% of the sperm are expected to get into the cervical canal which is a reservoir and will release sperm slowly for days after intercourse to ensure that sperm are present when the egg is released.
if i am trying to get pregnant when should i have sex if the ovulation predictor kit tells me what day i ovulated? . and what can i do keep the sperm inside me longer?