How many days does pregnancy usually take?

Pregnancy is generally 280 days, 40 weeks. It is calculated according to 7 days for a gestational week. Pregnancy from the last menstrual period before the calculation. Month minus three or is plus nine, the number of days plus seven for the expected date of delivery, generally one week in advance or one week after the wrong belongs to the normal situation, when pregnant is a weak female physique, the general needs of nutrients is also more. You can eat more lean meat, eggs, milk and soy products or apples, bananas, pitaya, hazelnuts, walnuts, dates and other nutritional values are relatively high. Can enhance the physique of pregnant women, but also help the child's growth and development. Be sure to do pregnancy check-ups on time during pregnancy and monitor the child's situation at any time.