2019 July 10 when is the due date of the last menstruation?

Expected date of delivery, that is, the expected date of delivery of pregnant women. Because it is difficult to accurately judge the pregnancy time of pregnant women, it is medically stipulated that the expected date of delivery is calculated from the first day of the last menstruation and pushed back by about 280 days. That is to say, 40 weeks of pregnancy is equivalent to 10 months. The expected delivery date can be calculated by the following methods:

1, calculated according to the last menstruation:

The month of last menstruation plus 9 or minus 3 is the estimated number of delivery months; Days plus 7 is the estimated delivery date.

For example, the last menstrual period is April 14, 15, the date is 15+7=22, the month is April 4-3= 1, and the expected date of delivery is 2015,65438+/kloc.

2, according to the fetal movement date calculation:

If the pregnant woman can't remember the date of the last menstruation in the late Qing Dynasty, she can calculate it according to the date of fetal movement. Generally, fetal movement begins after pregnancy 18-20 weeks. The calculation method is: the primipara is the fetal movement day plus 20 weeks; The multipara is fetal movement day plus 22 weeks.

3, according to the basic temperature curve calculation:

The last day of the low temperature section of the basal body temperature curve is regarded as the ovulation date, and it is calculated from the ovulation date for 264-268 days, or 38 weeks.

4. According to the B-ultrasound examination:

When doctors do B-ultrasound, they can estimate the gestational age and calculate the expected date of delivery according to the measured fetal head diameter, head and hip length and femur length.

5. Calculation of morning sickness time:

Morning sickness usually occurs in the sixth weekend of pregnancy, that is, 42 days after the last menstruation, and the estimated expected date of delivery is 280 days later.

6, according to the height of the uterus bottom rough estimate:

If the date of the last menstrual period is not clear, pregnant women can roughly estimate the expected date of delivery according to the height of the uterine bottom. At the end of April, the height of pregnant women's uterus was between navel and pubic margin (above pubic symphysis10 cm); At the end of May, the fundus was below the umbilicus (suprapubic16-17 cm); At the end of June, the uterus lay flat on the navel (above the pubic bone19-20 cm); At the end of July of pregnancy, the bottom of the uterus is at the three horizontal fingers above the umbilicus (22-23 cm above the pubic bone); At the end of the eighth pregnancy, the xiphoid process at the bottom of the uterus is in the middle of the umbilical cord (24-25 cm above the pubic bone); At the end of September of pregnancy, the fundus of uterus is 2 fingers below xiphoid process (28-30 cm above pubic bone); At the end of the tenth month of pregnancy, the height of the uterine bottom returned to the height at eight months, but the abdominal circumference was larger than that at eight months.