39 weeks pregnant stomach like menstruation hidden pain may be symptoms of labor, but may not be symptoms of labor such as false contractions and other conditions, need to be specifically analyzed. 1. Prolonged labor symptoms: If the pregnant woman 39 weeks pregnant stomach pain with regularity, such as 10 minutes pain 1 time or 5 minutes pain 1 time, and the feeling of pain is getting more and more serious, often suggests that it is going to give birth, the need to pack up things immediately to the hospital to wait for delivery. 2. False contractions: If the pain in the stomach during the 39th week of pregnancy is not regular, and the pain can be relieved soon, this situation is the possibility of false contractions. False contractions are non-regular contraction pain, more common in late pregnancy, the pain is not very strong. If the pregnant woman in the 39th week of pregnancy stomach like menstruation like hidden pain, it is recommended to consult a doctor in time, under the guidance of the doctor, improve the relevant examination, clear the cause of the disease, symptomatic treatment.