The posterior position of the uterus means that the position of the uterus in the pelvis is posteriorly deviated and the cervical opening is upward, which is not easily immersed in semen and the chance of conception is significantly reduced. However, the chances of pregnancy can be increased by adjusting the sexual position during sex. For the posterior uterus, the following methods can be used to increase the chances of conception: 1. Insist on doing knee and chest exercises, lying down and kneeling up 2-3 times a day for 15-20 minutes each time. In the menstrual period should also be prone once a day, so when the uterus is slightly soft, it is conducive to help the forward tilt. 2, when intercourse, the woman under the buttocks a pillow or soft pad of appropriate thickness, so that the ejaculated semen can be concentrated toward the posterior vaginal vault, and continue to raise the buttocks lying in bed for 20-30 minutes. 3, when having intercourse take the male rear position, the female kneeling crawl sex position, in order to facilitate the ejaculated semen to be retained in the vaginal vault. 4.After ejaculation, the woman should lie down for 30 minutes and do not urinate for half an hour to avoid the outflow of semen, so that the cervical opening is in full contact with the semen, increasing the number of sperm entering the uterus and improving the chances of success in pregnancy. 5, uterine round ligament shortening or uterine suspension, the effect of this kind of surgery is not sure, and can recur after several years, at present most do not advocate the use of this method. In conclusion, taking the correct posterior uterine pregnancy position can effectively improve the success rate of pregnancy, of course, there are many other reasons that affect the success of conception, if necessary, it is recommended to go to the regular hospital for consultation.