At 40 weeks of pregnancy, the belly is full term and the constant hardness and tightness of the belly indicates the presence of contractions, but how soon the pregnant woman can give birth depends on the nature of the contractions. A pregnant woman at 40 weeks of pregnancy is close to her due date and the presence of a tight, hard abdomen is a sign of contractions. If the contractions are regular, i.e., they occur once every 5-6 minutes and last for more than 30 seconds, and are accompanied by significant pain in the lower abdomen, the woman will usually give birth within 24 hours. If a pregnant woman has only tight and hard abdomen, without regularity, without redness or abdominal pain, but if they are caused by false contractions, it is impossible to determine the exact time of delivery of the baby. Therefore, pregnant women who have contractions should closely observe the intensity and frequency of contractions and go to the obstetrics and gynecology department of the hospital in time for delivery if the contractions increase significantly and are too frequent, especially if they are accompanied by significant abdominal pain and vaginal bleeding.