If you are pregnant for more than 30 days and your stomach does not hurt, you need to check whether you have had a miscarriage or an ectopic pregnancy. 1. Pre-eclampsia: the second part of the patient more than 30 days pregnant with the phenomenon of vague pain in the stomach, considered to be caused by pre-eclampsia, generally and fetal factors, maternal factors, environmental factors and the father’s factors and other factors, which can lead to the patient to appear a small amount of vaginal bleeding, pain in the lower abdomen, back pain and other uncomfortable symptoms. 2. Ectopic pregnancy: the fertilized egg is deposited outside the uterine cavity, which can lead to menopause, abdominal pain, vaginal bleeding and other uncomfortable symptoms. There are many reasons for the vague pain in the stomach on the 30th day of pregnancy, so it is best to go to the hospital in time for reasonable treatment under the guidance of the doctor.