What causes water breaking in pregnant women?

In general, premature rupture of membranes (PROM) in pregnant women may be associated with frequent sexual intercourse, polyhydramnios (excessive amniotic fluid), abnormal fetal position, placental abruption, or genital tract infections. Patients are advised to follow medical instructions for symptomatic treatment. Specific analyses are as follows:

1. Frequent Sexual Intercourse

Excessively frequent sexual activity or overly vigorous movements during late pregnancy may lead to membrane rupture. Additionally, vaginal douching due to vaginal inflammation in the third trimester may also increase the risk of PROM. Patients can take medications such as progesterone soft capsules or dydrogesterone tablets as directed by a physician.

2. Polyhydramnios

Polyhydramnios refers to an amniotic fluid volume exceeding 1500 ml, which causes excessive stretching of the amniotic sac and may lead to premature rupture. This condition may result from issues related to the placenta or fetus that cause increased amniotic fluid production. Patients are advised to rest in bed, minimize walking, use a bedpan when necessary, adopt a head-low, pelvis-high position, and seek prompt medical evaluation at a hospital.

3. Abnormal Fetal Position

When the fetal position is abnormal, uneven pressure is exerted on the fetal membranes, which may lead to premature rupture. It is recommended to go to the hospital promptly to deliver the baby, and cesarean section may be performed under medical guidance.

4. Placental Abruption

Placental abruption occurs when the placenta detaches prematurely from the uterine wall, leading to fetal hypoxia and potentially causing early rupture of membranes. Causes may include maternal hypertension, placental abnormalities, smoking, alcohol consumption, and other factors. Patients can follow medical advice to use medications such as progesterone soft capsules or combined valerate estradiol tablets.

5. Genital Tract Infection

If a pregnant woman develops infections such as *Ureaplasma urealyticum*, *Chlamydia trachomatis*, or bacterial infections, pathogens may ascend into the amniotic cavity, affecting embryonic development and potentially causing premature rupture of membranes. Patients can take medications such as amoxicillin granules or cefixime dispersible tablets as prescribed by a doctor.

In addition, PROM may also be related to factors such as pelvic stenosis or cephalopelvic disproportion. If patients experience any discomfort or symptoms, they should seek timely medical attention to avoid delays in diagnosis and treatment.