Most women’s uterus is in anterior position. If the uterus is in anterior position and has good uterine mobility during gynecological examination, women do not need to take special positions, and normal supine position can be used to combine rooms, which will not affect normal pregnancy. If the uterus is in posterior position, the cervix is located in front of the vagina, and the semen will gather in the posterior vaginal vault when the woman is in supine position, at this time, if the sperm mobility is poor, it may affect normal pregnancy, but in the case of normal male sperm mobility, the sperm can swim into the uterine cavity of the woman and will not affect normal pregnancy because of the position of the uterus. Women can also put pillows under their hips for 10-15 minutes after sex, which can help sperm enter the uterine cavity.