As the heart of every member in the family, babies are naturally expected by everyone. So when mothers start getting pregnant, they will calculate the number of days of pregnancy and infer the delivery period based on the first day of pregnancy. So when does pregnancy start?
The duration of pregnancy is calculated from the first day of a woman's last menstrual period, with 7 days being a week and 4 weeks being a month. The typical duration of pregnancy is 40 weeks, totaling 280 days, which is why there is a saying of having a baby in October. Women only have the possibility of conception during ovulation. The 14 days before menstruation are ovulation days, and the 5 days before and 4 days after ovulation are called ovulation periods. So female friends who are preparing for pregnancy should remember the time of their menstrual period.
Many people calculate the number of days of pregnancy from the day when sperm and egg combine, that is, from the day of sexual intercourse. However, this algorithm is actually incorrect. Because pregnancy can occur before and after the last menstrual period, and some people may even become pregnant before the last menstrual period. However, most of them only begin to conceive during the ovulation period after the last menstrual period.
Some girls are busy with work and don't pay attention to the timing of their menstrual period. After waiting for pregnancy, when doctors ask her, she becomes confused and doesn't know what to do. Female friends can still calculate pregnancy time from other aspects, such as based on fetal movement. If female friends feel that the fetus is moving, usually at 20 weeks after pregnancy, they can add 20 weeks so that they can calculate the expected delivery date.
