After getting pregnant with a baby, female friends need to calculate the time of pregnancy, which can help them know the due date and make it easier to schedule prenatal check ups. Usually, a woman's pregnancy time is calculated based on her last menstrual period. So, why is pregnancy counted from the last menstrual period?
The reason why a woman's pregnancy time should be calculated from the last menstrual period is because the time of egg fertilization is not easy to determine and it is difficult to find a specific time. Therefore, it is necessary to calculate a woman's pregnancy time from the first day of the last menstrual period, and this is a universal standard.
Some women forget the time of their last menstrual period, and then need to use other methods to calculate, such as calculating based on the time of the appearance of fetal buds or fetal heart rate. Generally, the appearance of fetal buds is around 6 weeks of pregnancy, while the appearance of fetal heart rate is around 7 weeks of pregnancy. This can be determined by ultrasound examination based on the appearance time of fetal buds and fetal heart rate to determine when pregnancy is.
By confirming the pregnancy time, the expected due date can be determined. However, it should be noted that the calculated pregnancy time is only a rough estimate and not very accurate. So women often experience premature or delayed childbirth. And when it comes to the timing of pregnancy, there's no need to be too serious.
