Stomach pain is not a symptom of pregnancy, mainly gastritis and duodenal ulcer can cause stomach pain. The main symptoms of pregnancy are menopause and delayed menstruation. Generally, pregnancy should be considered after menstruation, and menopause is the earliest symptom of pregnancy. After menopause for a period of time, early pregnancy reaction symptoms have not yet appeared, about six weeks after menopause can appear early pregnancy reaction, the symptoms often have dizziness, fatigue, drowsiness, loss of appetite, nausea, especially in the morning, dry heaving, these symptoms are known as early pregnancy reaction, generally in the twelve weeks of pregnancy disappears on its own.