Birth Control Options -- familydoctor.org理论理论,咱能不纸上谈兵么?
现实而言,TT没副作用,失败百分比还低很多。
Birth Control Options -- familydoctor.org
Failure rates when birth control methods are used carefully
Not having sex 0%
。。。
Birth Control Options -- familydoctor.org
Failure rates when birth control methods are used carefully
Rhythm 20%