Pregnant 4 months how does abdomen ache return a responsibility

Abdominal pain in the second trimester is generally caused by the enlargement of the uterus and the pulling of the round ligament of the uterus. It is a normal physiological phenomenon, especially when walking a long distance, or changing the position, the pain will be more obvious. In addition, excessive force during intercourse in the second trimester may also lead to this phenomenon.