Orgasm in early pregnancy has a certain effect on the fetus. The state of the fetus in early pregnancy is still not very stable, it is not recommended to have intercourse, because if you have an orgasm during intercourse, it will easily lead to uterine contractions, severe and frequent contractions will easily induce preterm miscarriage. Late pregnancy is also not recommended to avoid inducing premature birth, in order to ensure that the fetus in the body can grow healthily, the first three months of pregnancy is best not to have sex, especially the first six weeks of pregnancy, the first six weeks of pregnancy fetal heart has not developed well, the fetus is extremely unstable to prohibit sexual intercourse. To the mid-pregnancy, although appropriate coitus, but pay attention to the frequency and intensity, minimize the stimulation of the uterus so as not to induce contractions, the healthy growth of the fetus in the uterus to cause adverse effects. At the same time for the first sign of abortion, or multiple spontaneous abortion history, premature rupture of membranes history, placenta previa and other pregnant women prohibited coitus.