How to know how many days pregnant

How to know how many days pregnant? To know how many days pregnant is calculated according to the last menstrual period, the details are as follows: 1. Normal menstruation, normal ovulation, calculated according to the last menstrual period. 2. B ultrasound to understand the size of the intrauterine gestational sac, to calculate the time of conception, and to calculate the expected date. If menstruation is not adjusted, it can also be calculated according to the time of pregnancy in the same room, plus two weeks. Generally most women pregnant 36 days or so, will show nausea, vomiting, loss of appetite, dizziness, want to sleep, or suddenly want to eat certain foods, fruits, want to eat some acidic things. 3, menstrual stop 40 days after B ultrasound, relative calculation of pregnancy days more accurate. Pay attention to nutrition balance during pregnancy, work and rest.