When orgasm in late pregnancy, it will stimulate the uterus, resulting in uterine contractions, twitching and spasms, this situation will not have a direct impact on the baby, if the uterine contractions are too strong, it may cause true contractions, resulting in the possibility of preterm labor. In late pregnancy, it is best not to have intercourse, and do not have an orgasm, to avoid the occurrence of preterm labor, in late pregnancy, if intercourse, will easily stimulate the uterus to cause premature rupture of the amniotic sac, amniotic fluid outflow. Because in late pregnancy, the fetus has descended into the pelvis, at this time the cervical opening is in a state of micro-dilatation, the cervical canal becomes shorter, if the action is too rough, it is easy to lead to the rupture of the amniotic sac, so that it will affect the fetus in the uterine cavity after the rupture of the water, leading to intrauterine infection.