Early pregnancy, the first three months should be prohibited from sex, it is best not to masturbate, because early pregnancy, the embryo is just in the developmental stage, the placenta and the mother’s uterine wall connection is not solid, at this time, if sexual intercourse, it is likely that due to the position of the inappropriate, the movement of the overly intense, and the vagina and uterus contraction caused by the female orgasm, so that the uterus is shocked, it is very easy to week to the placenta detachment, resulting in miscarriage. Masturbation is also a way of sexual life, it can also make women have an orgasm, the same will have a stimulation of the uterus and thus affect the placenta, increase the chances of miscarriage. Similarly, in late pregnancy, after 36 weeks of pregnancy, do not cohabit, also easy to lead to infection and premature labor. In addition, masturbation is also prone to gynecological inflammation, resulting in urinary tract infections, which is very unfavorable for women during pregnancy, so it is best not to masturbate during pregnancy.