Internal ejaculation during the first month of pregnancy, the semen that enters the woman’s vagina does not have a direct effect on the development of the fetus. However, it is theoretically not allowed to have sexual intercourse if you are in the first month of pregnancy. Because all channels of conception are basically closed after a woman is pregnant, whether it is the woman’s cervical opening, or the fallopian tubes, or the uterus, it is no longer possible for sperm to enter and fertilize the fetus, so internal ejaculation does not have an effect on the fetus. However, because the pregnancy is only one month old, the gestational sac is unstable when it has just settled, and if you have sex at this time, it is very easy to cause a preterm abortion. Therefore, sex is generally not allowed in the first trimester of pregnancy, but can be appropriate in the middle 4-7 months of pregnancy. In the early stages of pregnancy, in order to avoid preterm abortion, it is necessary to control properly.