You can have intercourse during pregnancy, but generally not within 12 weeks and above 28 weeks, because the formation of the embryo is mainly supported by progesterone within 12 weeks of pregnancy, and the placenta has not yet formed. If intercourse is easy to cause embryo miscarriage, bleeding and infection, while stimulation of intercourse above 28 weeks can cause contraction of the uterus and cause premature labor, even infection, and even premature abruption of the placenta and premature rupture of the fetal membranes. Therefore, you cannot have intercourse within 12 weeks and above 28 weeks. But between 12 and 28 weeks, you can have intercourse. However, you should pay attention to the position and strength of intercourse. If there are other problems, such as premature rupture of membranes or placenta previa, intercourse is prohibited. The time of intercourse is usually chosen between 12 and 28 weeks, but it should be appropriate and not too hard or with complications.