Ejaculation during pregnancy will not affect the development of the fetus. After ejaculation, most of the semen will be expelled from the vagina and only a small amount of sperm will enter the uterine cavity. Since the ovaries do not ovulate during pregnancy, the sperm will not be able to unite with the egg and will die on its own after 2-3 days, so it will not affect the fetus. It is recommended to pay attention to the following points when having intercourse during pregnancy: 1. Pay attention to the hygiene of sexual life and wash the vulva before and after sex to avoid pathogenic infections. 2. Be gentle and avoid rough movements during intercourse to avoid stimulation that may cause uterine contractions resulting in preterm abortion, such as vaginal bleeding or pain in the lower abdomen.