Before giving birth to a baby, that is, before labor, the reactions and signs of prenatal labor include the falling of the prenatal dew, vaginal bleeding, uterine contractions and other manifestations. 1. Decrease of the prenatal dew: Before labor, the prenatal dew will decrease and the bottom of the uterus will move, the pregnant woman will feel swelling in the lower abdomen, the pelvis will have a feeling of dilatation, and the pressure of the stomach may be reduced, and the appetite will become better, and the breathing will become smoother. 2. Vaginal bleeding: small capillary rupture after the peeling off of the fetal membranes from the uterine wall there in late pregnancy, there may be a small amount of vaginal bleeding, and some women have increased secretions. 3. Uterine contractions: before labor, there will be false uterine contractions, uterine contractions are shorter in duration, lighter in intensity, longer in interval and irregular. When the contractions gradually increase, the intervals between contractions are gradually shortened, the duration is gradually lengthened, the degree of pain gradually increases, the cervical canal is shortened, the cervix is dilated, the pregnant woman enters the state of labor. During late pregnancy, do a good job of maternity checkups and observe the changes in your body, and consult a doctor if there are any abnormalities.