How many days is the pregnancy cycle?

The pregnancy cycle is 280 days, about 40 weeks, usually from the first day of the last menstrual period, until the birth process takes about 280 days, that is, 10 months, but one week early and one week after are normal. If the menstrual rule is irregular, or the menstrual cycle is long, this situation can generally be calculated by doing B-ultrasound to calculate the number of days of pregnancy and the expected date of delivery, but also according to the early pregnancy reaction to calculate the number of days of pregnancy, pregnancy should be done on time, you can listen to fetal heart sounds, self-test fetal movement, monitor fetal growth and development at any time, pay attention to rest, prevent doing strenuous exercise. Pay attention to diet, try to eat more nutritious food.