A bout of pain in the stomach in the fourth month of pregnancy could be a sign of preterm miscarriage. If a pregnant woman feels a pain in her stomach in the fourth month of pregnancy, we should highly suspect that it is a case of uterine contraction. It is advisable for the pregnant woman to rest in bed and avoid straining and emotional excitement. If the contractions become more frequent or the pain in the stomach gets worse, you should go to the hospital as soon as possible. If necessary, the doctor should give hospitalization to keep the fetus alive, because the fetus will not be viable after delivery.