Will a hard stomach at 31 weeks lead to premature birth?

Apr 17, 2025 Source: Cainiu Health
Disease description:

I'm 31 weeks pregnant. My belly has been getting hard off and on for the past two days, and it really scared me. Could this mean preterm labor? What should I do?

Doctor's answer (1)
Dr. Zhang Lu

In general, a hard stomach at 31 weeks of pregnancy does not necessarily indicate preterm labor; it could be a normal occurrence or a potential sign of preterm labor.

At 31 weeks of pregnancy, the uterus becomes more sensitive and may experience irregular contractions, manifesting as a hard stomach. These are typically false labor contractions (Braxton Hicks contractions). They are characterized by their irregular occurrence, short duration, and weak intensity. Usually, they do not cause cervical changes or lead to preterm birth and often subside after rest or changing positions.

However, if these false contractions become more frequent or stronger, develop a regular pattern, and are accompanied by other symptoms of preterm labor, such as vaginal bleeding or reduced fetal movement, they may cause shortening of the cervix and dilation of the cervix, thereby increasing the risk of preterm birth. In such cases, timely medical evaluation is necessary. If a pregnant woman experiences a hard stomach at 31 weeks, it is advisable to first monitor the frequency and intensity of the contractions and not to worry excessively.

In daily life, pregnant women should maintain a relaxed mindset, pay attention to rest and diet, avoid excessive fatigue and strenuous exercise, and reduce the risk of preterm birth. Additionally, regular prenatal checkups are also important for ensuring the health of both mother and baby.