mirena is an effective birth control method that works in two ways: hormonal and as an iud. basically it is blocking implantation of a fertilized ovum in the uterus. it is not a sperm assasin. the human body is designed for conception and the female body does not kill sperm. sperm live a very short life and will die off in about a week after being deposited in the female genital tract. while the enviroment may always be overly-welcoming to the invasion of sperm and many will die in their journey the female body doesn't intend on killing the.
does the female body kill sperm to keep it from entering the egg or does the sperm just die after so long? . the reason i'm asking is i had someone tell me that you can't get pregnant from sex you had before the mirena was taken out. i had mine taken out and when i got to the dr they asked if i'd had sex in the past week. i had and they said that theres a chance i could get pregnant from the sex that i had that morning before i got it taken out. someone said that can't happen because the woman's body kills all of the sperm while the mirena is in so there'd be no sperm left after it was taken out.