Calculation method of pregnancy time

summary

Understanding the time of pregnancy is of great help to the understanding of the expected delivery date, so that pregnant women can have a certain psychological preparation in advance, and most expectant mothers do not know the calculation method of pregnancy time, so let's take a look at the calculation method of pregnancy time.

Calculation method of pregnancy time

Common algorithm: that is, you start to calculate from the day of your last menstruation, the due date is calculated from the day of your last menstruation, plus nine or minus three, and then plus seven, which is the due date. This is a certain deviation, the mathematics is not good mother to be do not miscalculate.

Fetal movement calculation: if you can't remember the date of the last menstruation, you can calculate it according to the date of fetal movement. Generally, fetal movement begins 18-20 weeks after pregnancy. The calculation method is: primipara is fetal movement day plus 20 weeks; multipara is fetal movement day plus 22 weeks.

B-ultrasound calculation: when doctors do B-ultrasound, they can estimate the gestational age and calculate the expected date of delivery by measuring the diameter between the two heads, the length of the head and hip and the length of the femur. This method is very accurate and convenient.

matters needing attention

These are the calculation methods of pregnancy time, there are several calculation methods in life, but now most people use B-ultrasound calculation, this method is the most practical, and the time is relatively accurate.