When a woman is about to give birth, contractions will gradually become more frequent. Usually at first the uterus will change from contracting once every half hour to about once every 10 minutes, and the pregnant woman may feel a paroxysm of pain. Subsequent contractions will occur once every 5 minutes or so, with each pain lasting 40-50 seconds. If the contractions occur once every 2-3 minutes and the pain lasts longer, about 60 seconds or even longer, it indicates that the woman may enter the second stage of labor, suggesting that the fetus is about to be born. These contractions generally cannot be suppressed by medication and pregnant women should be prepared for them psychologically. If a pregnant woman has the following symptoms in late pregnancy, she should go to the hospital for examination and delivery: 1. The pregnant woman feels relief of breathing difficulty, disappearance of stomach pressure and increase in food intake, which are signs of under-transition; 2. The under-transition of the fetal head increases the pressure on the pelvis of the pregnant woman, which leads to symptoms of abdominal cramps and back pain; 3. The feeling of defecation is more intense in the throes of pain; 4, due to increased secretion of estrogen, vaginal discharge will increase; 5, due to uterine contraction, the fetus falls into the pelvis, the fetal membrane and uterine wall gradually separated by friction caused by blood vessel rupture and bleeding, commonly known as red, pregnant women should go to the hospital within a few hours of red. Some pregnant women still have to wait 1-2 days after the redness, sometimes several days before regular uterine contractions begin to appear.