The reasons why patients do not get pregnant after coitus can be many, as follows: 1, male problems: to see if there is a problem with the male sperm, because pregnancy is the combination of sperm and egg, the formation of fertilized eggs, if the quality of male sperm does not pass, will not get pregnant. 2, female problems: women have only one time in the menstrual cycle ovulation, if it is not in the women’s ovulation period coitus, will not get pregnant. Some people can’t get pregnant even if they have intercourse during the ovulation period, because some women have abnormalities in ovulation, and others have problems with their fallopian tubes, such as tubal impassability, so they can’t transport male sperm into the fallopian tubes to meet with eggs, which will also lead to non-pregnancy. Therefore, after patients find the above symptoms, it is best to go to the hospital for a systematic examination.