How many days of pregnancy are there?

about the total number of days of pregnancy. Pregnancy throughout the pregnancy, to the expected date of birth about 280 days, that is, ten months pregnant. We clinically calculate the time of pregnancy from the first day of the last menstrual period, seven days for a week, four weeks for a month, pregnant 40 weeks is pregnant ten months, that is, the expected date of birth. Generally, the vast majority of pregnant women are close to the expected date of birth, a small number of pregnant women may occur premature or miscarriage. Therefore, the total number of days of pregnancy, this is different from person to person. Generally 37 weeks even if full-term, full-term after patients will continue to launch early delivery.