If you are 37 weeks pregnant and your stomach hurts like menstruation, there may be the following reasons: 1. normal labor, generally 37 weeks pregnant belongs to full-term labor, if it hurts like menstruation and worsens in paroxysms, it may be normal contractions, that is, imminent labor. 2. stomach pain caused by other systemic diseases, such as intestinal cramping pain caused by acute gastroenteritis, this pain is usually accompanied by diarrhea, fever, nausea, vomiting and other reactions. 3, The pain is usually accompanied by diarrhea, fever, nausea, vomiting and other reactions. 3. It may be caused by gynecological inflammation, such as adnexitis, ovarian cyst twisting infection, etc. Therefore, if your stomach hurts like menstruation at 37 weeks of pregnancy, it is recommended to go to a regular specialized hospital to improve the relevant examination and give timely and effective symptomatic treatment after clear diagnosis.