Sudden tugging pain on the left side of the stomach at 26 weeks of pregnancy may be related to the pulling of the round ligament, right rotation of the uterus, adnexitis and other factors. 1. Pulling of round ligament: It may be caused by pulling the ligaments on the right and left sides of the uterus, i.e. round ligament, during the gradual growth of the fetus. However, it is usually mild and not particularly serious. 2. Uterine right-handedness: the uterus gradually enlarges after pregnancy, because the sigmoid colon occupies the left side of the uterus, the enlarged uterus will appear right-handedness. This causes the ligaments of the uterus to pull, causing the feeling of pain on the left side. 3. Ovarian cysts: Environmental pollution, chaotic lifestyle and infections lead to ovarian diseases and endocrine disorders, which in turn lead to ovarian cysts. When the left ovarian cyst tip torsion, may also appear left side pulling pain. If you are 26 weeks pregnant and suddenly have a pulling pain on the left side of your stomach, it is recommended to consult a doctor, follow the doctor’s instructions to choose the appropriate examination method, clarify the cause with the help of the doctor, and carry out targeted treatment or therapy.