A small cervix does not usually affect pregnancy, but may affect the vaginal delivery of the fetus. As long as the cervix is open, the sperm can pass through the cervix, reach the uterine cavity and fallopian tube, and combine with the ovary to form a fertilized egg, then the woman will be able to get pregnant. The cervical opening is small, on the one hand, due to congenital developmental factors, there is no method of treatment; on the other hand, it may also be related to the damage caused by inflammation, or cervical microwave and other surgical procedures caused by the cervix is small, this situation may lead to the woman in the period of pregnancy there is an increase in the chances of miscarriage, preterm labor. After pregnancy, women must pay attention to proper rest, regular checkups, and when there are cases of preterm labor, preterm labor, must be given birth control and symptomatic treatment.