More than 7 months pregnant, the stomach a little like menstrual cramps, this is considered by the uterine contractions, the phenomenon of preterm labor, because during pregnancy should not appear stomach pain, if only a slight crushing pain or swelling, that belongs to is a normal performance. Like menstrual cramps, this pain is not normal. You should check the ultrasound to determine the development of the fetus, and if it is determined that there is a preeclampsia, you should be treated promptly with medication to protect the fetus. At 7 weeks of pregnancy, magnesium sulfate or nifedipine can be used to preserve the fetus. Magnesium sulfate is an intramuscular or intravenous drug. This medication can inhibit smooth muscle spasms and relieve stomach pain caused by uterine contractions. These two drugs also have the effect of lowering blood pressure, can play a role in preserving the fetus, can not be applied at the same time, if applied at the same time will easily lead to low blood pressure.