It is common to carry a baby for 9 to 10 months, but the exact time of delivery will vary from person to person. Pregnancy is calculated from the first day of the last menstrual period, the month of the date of the last menstrual period plus 9 or minus 3 is the number of months of the expected date of delivery, the number of days plus 7 is the expected date of delivery. In medicine, four weeks, or 28 days, is one month, and pregnancies from 28 weeks to 37 weeks are considered preterm, and those greater than 42 weeks are considered term births. Normally, a woman will give birth between the 37th and 42nd week of pregnancy, which is considered full term. Not everyone goes into labor on their due date. It is normal to deliver within two weeks before or after the due date. You should eat plenty of fresh fruits and vegetables, rest and exercise reasonably well during late pregnancy to help with labor. It is recommended that after the late stage of pregnancy, you need to always observe and pay attention to whether there are symptoms of labor, if there are regular abdominal pain, redness, amniotic fluid flow and other symptoms, may be ready to give birth.