The falling stomach at 11 weeks of pregnancy may be related to physiological reasons, or it may be related to pre-miscarriage, gastroenteritis, and so on. 1. Physiological reasons: 11 weeks pregnant stomach drop if it is transient, consider that may be related to overwork, the stomach is pulled, etc., usually rest for a period of time after the symptoms can be relieved or even disappear. 2. Pre-eclampsia: In addition to the feeling of falling stomach, stomach pain, there are often vaginal bleeding and other symptoms, it is recommended to consult a doctor in time, under the guidance of the doctor for treatment. 3. Gastroenteritis: If the stomach catches cold, or eating spoiled food, etc. triggers gastroenteritis, it will also cause the symptoms of stomach pain, and there may be nausea and vomiting, diarrhea, etc., it is recommended to consult a doctor as soon as possible for treatment. Any discomfort during pregnancy should be treated promptly to avoid adverse effects on the fetus.