The desire to have intercourse after pregnancy is mainly because the estrogen in the body has increased thousands of times, so the desire to have intercourse will also increase, which is mainly a physiological reaction after pregnancy. It is recommended not to have sex during the first and second trimesters of pregnancy, mainly because the embryo development is still unstable during the first trimester. This time, intercourse can stimulate the uterus to contract and cause preterm miscarriage or inevitable miscarriage, and intercourse in the second trimester may also cause premature birth or intrauterine infection. Therefore, you should not have intercourse in the first and second trimesters of pregnancy, and it is advisable to sleep in separate beds with your husband to avoid the possibility of intercourse. In addition, you can have sex in the middle of pregnancy, but you must also abstain, to avoid frequent sexual intercourse to stimulate the uterus contraction and lead to intrauterine oxygen deficiency of the fetus.