After pregnancy, the hormone level in the body changes greatly, especially the estrogen increases thousands of times, which makes the libido increase, so after pregnancy, you want to have sex more than usual. However, sex after pregnancy is not good for the fetus, often through the stimulation of sex will lead to uterine contractions, and the occurrence of preterm abortion or inevitable abortion. So in the first trimester of pregnancy or do not have sex, it is recommended that couples are best to rest in separate beds, so as to avoid skin-to-skin proximity, to avoid the possibility of sex. Also do some distraction things, such as watching more TV, listening to some novels, or reading more positive energy books, which will distract the attention, and then avoid the possibility of sex. In addition, if you have sex in the middle of pregnancy, you must also pay attention to the action to be gentle, pay attention to sexual hygiene.