A hard pregnant tummy may be the uterus contracting, caused by physiological factors such as physiological contractions and pathological factors such as pre-miscarriage.
1. Physiological factors: such as physiological contractions. From 10 to 14 weeks of pregnancy, the uterus will have painless irregular contractions. As the weeks of pregnancy increase, the frequency and amplitude of these contractions increase accordingly. Physiologic contractions are sparse, irregular and asymmetric.
2. Pathological factors: e.g., pre-miscarriage, preterm labor. Preterm labor usually occurs before the 28th week of pregnancy and involves abnormal contractions of the uterus, accompanied by vaginal bleeding and lower abdominal pain. Preterm labor usually occurs between 28 and 37 weeks of gestation, when the uterus will have contractions that last no more than 30 seconds with an interval of 10 minutes or more.
In addition, if the pregnant woman is already in labor, there will be regular contractions lasting 30s or more with an interval of 5 to 6 minutes, at which time she should go to the hospital immediately.
If you have a hard little tummy during pregnancy, you should go to the hospital in time to find out the cause and exclude pathological factors, so as not to cause harm to the mother and fetus.