Feat usage:
(1), short effect or grow an effect contraceptive, anticonceptive.
(2), condom, because it can also keep germ inside the vagina from infect to the other party.
Not proper usage:
(1), practise birth control annulus, because put an annulus process in, probably inside vagina or the bacterium band on the neck of uterus go into a cavity of uterus but cause endometritis or pelvic inflammatory disease, PID, the women who originally possessed a pelvic inflammatory disease, PID after put the annulus may make the condition aggravate.
(2), vagina dissepiment, septum, have sexual intercourse a vagina dissepiment, septum to put in more than 8 hour inside the vagina behind because of every time, so will affect the excretion of vagina Secretions, may make the inflammation aggravate.
(3), external application contraceptive, anticonceptive, there is certain stimulative, past also not proper usage.
