Early breaking of amniotic fluid can be caused by external forces, congenital, infection and other factors. 1. External factors: If the amniotic sac cannot resist the tension and rupture is triggered if it is hit by an external force when the pregnancy week is relatively large. 2. congenital factors: if the pregnant woman is born with a loose cervical opening, the amniotic membrane is susceptible to external stimuli, resulting in premature rupture of amniotic fluid, or pregnant women with congenital pelvic stenosis, with the increase in pregnancy weeks, the amniotic cavity will be larger and larger, when the amniotic cavity is extruded, the pressure inside the cavity increases, resulting in premature rupture of amniotic fluid. 3. Infectious factors: when the reproductive tract is infected, such as anaerobic bacteria and chlamydia, the fetal membranes at the mouth of the cervix may be infected, resulting in rupture of the amniotic fluid. It is recommended to go to the regular hospital in a timely manner, in the way to the hospital to maintain a supine position, so as not to cause adverse effects on the fetus, life should pay attention to personal hygiene, to prevent falls and collisions, pay attention to rest.