What is the expected date of delivery in September?

Medically, the expected date of delivery is calculated from the first day of the expected date of delivery. The entire pregnancy period is 280 days, or 10 months (each month is 28 days). Pregnant women give birth between 38 and 42 weeks of pregnancy, which are all full-term deliveries. Because each woman's menstrual cycle is of different length, it is normal for the estimated due date to differ from the actual due date by 1-2 weeks. The key calculation methods are as follows:

Calculation based on the expected date of pregnancy:

Add 9 or subtract 3 from the month of the expected date of delivery to get the month of delivery; add 7 to the day of delivery to get the day of delivery. for example:

Ms. Chen's due date was March 13, 1999, and her due date was approximately December 20, 1999.

Ms. Chen's due date was May 28, 1999, and her due date was March 5, 2000.

Pregnant women can also calculate backwards from the first day of their due date to the 280th day, which is their due date.

Calculated based on the date of baby's fetal movement:

If you can't remember your due date, you can calculate it based on the baby's fetal movement time. Generally, fetal movement begins between 18 and 20 weeks of pregnancy. The calculation method is: for first-time mothers, it is the day the baby moves plus 20 weeks; for first-time mothers, it is the day the baby moves plus 22 weeks.

Calculated based on the basic body temperature curve:

The last day of the ultra-low temperature segment of the basal body temperature curve is taken as the ovulation period, and 264-268 days are counted backward from the ovulation period, or 38 weeks are added.

Calculated based on B-ultrasound examination:

When doctors do B-ultrasound, they can measure the biparietal diameter of the fetal head, the brachiocephalic diameter and the length of the femoral head to estimate the gestational age and calculate the date of delivery (this method is mostly used as a doctor's B-ultrasound examination for diagnosis).

Calculate from the time when morning sickness begins:

Morning sickness usually occurs on the 6th week of pregnancy, which is 42 days after the expected date of delivery, and then counting backwards to 280 days is the due date.