Contractions and menstrual pain have similarities, but they are not exactly the same. Women with menstrual cramps usually experience persistent swelling or dropping pains in the middle of the lower abdomen, while the pain that occurs in the early stages of contractions is similar to menstrual cramps, with irregular abdominal pain and abdominal hardening. In the late stages of pregnancy, as labor progresses, contractions intensify and become regular, the pain will increase and last longer, there will be obvious tightness and hardness in the abdomen, accompanied by pain in the lumbosacral region, wanting to have a bowel movement and other discomforts, and the pain may be more pronounced and regular until the delivery. Women’s contractions and menstrual pain are not exactly the same performance, contraction pain need to be closely observed, once there is a regular contraction need to be checked in time for labor.