Sexual intercourse is not recommended during the first and second trimesters of pregnancy. Because the fetus is not particularly stable in the first trimester, the stimulation of sexual intercourse is likely to cause a preterm miscarriage, but it will not affect the development of the fetus. In the second trimester, the uterus enlarges and stimulates contractions, which may cause premature labor and easily compress the fetus. In the middle 3 months of pregnancy, if there are no special circumstances, it is possible to have intercourse, but the number of intercourse should not be too frequent, the action during intercourse should be careful to be gentle, you can take the side lying position, try to avoid squeezing the abdomen, if there is an uncomfortable feeling, you need to stop in time.