Many times, female friends do not know when they became pregnant. Usually, they experience discomfort after menopause and only find out after going to the hospital for examination. So what does a doctor calculate the number of days of pregnancy? This has always been a problem for women who do not know how to calculate pregnancy time. Now, let me reveal this answer for you.
Due to the difficulty of accurately determining the time of conception for every pregnant woman, medical regulations stipulate that the due date is calculated from the first day of the last menstrual period, and the entire pregnancy period is 280 days, with 10 pregnancy months (28 days per pregnancy month). Pregnant women give birth within 38-42 weeks of pregnancy, all of which are full-term deliveries. Due to the varying length of each woman's menstrual cycle, it is normal for the estimated due date to differ from the actual due date by 1-2 weeks. The main calculation methods are as follows:
1. According to the calculation of the last menstrual period: the month of the last menstrual period plus 9 or minus 3 is the expected number of months for the due date; Add 7 days to the expected due date.
2. Based on the date of fetal movement: If you cannot remember the date of your next menstrual period in the late Qing Dynasty, you can use the date of fetal movement to calculate. Generally, fetal movement begins at 18-20 weeks after pregnancy. The calculation method is: primiparous women have fetal movement days plus 20 weeks; Postpartum women have a fetal movement day plus 22 weeks.
3. According to the basal body temperature curve calculation: the last day of the low-temperature segment of the basal body temperature curve is taken as the ovulation day, and 264-268 days or 38 weeks are calculated from the ovulation day onwards.
4. Calculated based on B-ultrasound examination.
5. Calculated from the time of morning sickness.
Knowing the number of days of pregnancy is very important for expectant mothers. Only by knowing the number of days of pregnancy can they determine the stage of their pregnancy and better accept the corresponding pregnancy symptoms. I hope that after reading this article, all female friends can understand how doctors calculate the number of days of pregnancy and make timely preparations for each stage of pregnancy.
