It is not possible to generalize how long it will take to deliver a 15-minute contraction, as it may take 3 to 7 days for labor to actually begin, and the time of delivery is not fixed. How long does it take for a contraction to last 15 minutes can’t be generalized, the phenomenon can be called preterm labor, and preterm labor will gradually develop into labor, if the pregnant woman doesn’t have the symptom of contractions gradually increasing, it may take 3~7 days to enter the period of labor. If the contractions are increasing in frequency and symptoms are getting stronger, labor may be imminent. Pregnant women in labor will experience regular, gradually increasing contractions that last 30 seconds or more each, 5-6 minutes apart, and are accompanied by a feeling of bloating in the lower abdomen and a small amount of bloody vaginal discharge. The delivery time for pregnant women who are in labor is not fixed. Some pregnant women may go into labor about 24 hours after entering labor, while some may take nearly 2 days to complete the delivery. It is recommended that pregnant women who experience contractions once every 15 minutes should first seek medical attention to determine how the fetus is settling into the pelvis, and under the guidance of the doctor, they may choose to go home and wait for labor or be hospitalized to wait for delivery, depending on their actual situation.