Tightening of the stomach once every 10 minutes is more likely to be a contraction. Generally speaking, contraction is a feeling of rhythmic pain in the lower abdomen, accompanied by a feeling of tightness and hardness in the abdomen, and regular contractions usually occur before labor. Initial contractions are usually 10-20 minutes apart, with a shorter interval, usually around 30s, and the symptoms are mild. If the intensity of contractions increases, the duration is prolonged, and the interval is shortened to once every 3-5 minutes, then it is considered to be a symptom of labor. Regular contractions are the main sign of labor, and with the passage of time, there is also the disappearance of the cervical canal and dilatation of the uterine opening. If the contractions are regular, it is advisable to seek medical attention and hospitalization.