女性私处有多道防御屏障。最重要的一条防线在子宫腔的内膜,它有很多处皱折,阻止病菌进入输卵管;月经来潮,内膜剥落,粘附的病菌也被“冲出”子宫腔。可这道防线会在月经期暂时撤离。子宫内膜剥落后,留下了巨大的创面,子宫颈的黏液栓为经血流所代替,阴道的酸性环境为经血的中性所代替。 Female private parts have multiple defensive barriers. The most important line of defense in the uterine lining of the intima, it has a lot of wrinkles, to prevent bacteria from entering the fallopian tubes; menstrual cramps, endometrial stripping, adhesion of bacteria have also been "out of the uterine cavity. This line of defense may temporarily withdraw during menstruation. After the endometrial stripping, leaving a huge wound, the mucus plug of the cervix is ​​replaced by blood flow, vaginal acidic environment is replaced by the neutral blood.