Contractions are pain that is induced by strong uterine contractions that are closer to the lower abdomen. Contractions usually last throughout labor, starting with regular contractions and continuing until the placenta is delivered, which is when the fetus and its appendages are delivered from the uterus by the mother’s contractions. The contractions are accompanied by abdominal tightness and tenderness, and some pregnant women may experience lower abdominal cramps at the beginning of labor, while others may experience lumbosacral pain. Contractions usually last for about ten seconds at the beginning of labor, and as labor progresses, the intervals between contractions will become shorter and shorter, the duration will become longer and shorter, and the pain will become more and more intense. In the second trimester, it is recommended that pregnant women should exercise properly, take a scientific diet, eat light food as much as possible, and have a good prenatal checkup. If persistent painful contractions occur, it is recommended to go to the hospital immediately.