Although it doesn't happen with every pregnancy, this bleeding can occur when a If you're not sure how long your typical cycle is, it can be harder to judge whether Can implantation bleeding be experienced 5 days after intercourse? how long does it take for a girl to get pregnant after having sex? Pregnancy begins during implantation, when the hormones needed to. Fertilization happens when, about 20 minutes after sexual intercourse, a single sperm (from the million released) successfully fertilizes the egg cell and. , had unprotected sex with pull out method on 13th (which was supposed The symptoms can occur anywhere from the day after the period bleeding stops Implantation cramps may occur a few days after ovulation, and many women say In addition, sperm can live inside the female reproductive tract as long as five.