Abdominal distension is not necessarily a sign of pregnancy, but may also be a sign of other diseases such as digestive system. Abdominal distension is commonly caused by digestive system diseases, such as gastritis, dyspepsia, gastric ulcer, gastric cancer and other stomach diseases, biliary tract stones, cholecystitis, liver tumors and other liver and gallbladder diseases, as well as pancreatic diseases such as pancreatitis, pancreatic tumors and other pancreatic diseases may cause abdominal distension. In addition to digestive system diseases, acute myocardial infarction, pleurisy, etc. can also cause abdominal distension. Currently, the diagnosis of pregnancy is based on the delayed menstruation or menopause after sexual intercourse, elevated levels of HCG (human chorionic gonadotropin) in blood or urine tests, and ultrasound examination. Therefore, it is recommended to consult a medical professional for a standardized diagnosis and treatment if necessary.