Sperm cells in semen (cum) swim up the vagina, through the cervix and uterus, and into the fallopian tubes. If there's an egg in the fallopian tube and it meets up .
Your tot is well protected inside her fluid-filled amniotic sac. And a mucus plug seals off your partner's cervix (which opens into the uterus) to to stimulate labor sexually, be sure to ejaculate inside your partner's vagina).
Far back in the corners of the uterus, on each side, are microscopic canals through . Yet even the semen is a potentially dangerous milieu for the sperm; any.