How many weeks of pregnancy is considered full term

Pregnancy time refers to the period from pregnancy to delivery. Pregnancy (or pregnancy, pregnancy) refers to the fact that a female mammal (including humans) has one or more fetuses or embryos in her body. Human pregnancy is the best scientifically studied of all mammals. Because every pregnant woman cannot accurately tell the time of pregnancy, medicine requires that the expected date of delivery be calculated from the first day of pregnancy. The entire pregnancy period is 280 days, 10 gestational months (each gestational month is 28 days). Pregnant women give birth between 38 and 42 weeks of pregnancy, which is considered full-term. 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 to 2 weeks.

Because every pregnant woman cannot accurately tell the time of pregnancy, medicine requires that the expected date of delivery be calculated from the first day of pregnancy. The entire pregnancy period is 280 days, 10 gestational months (each gestational month is 28 days). Pregnant women give birth between 38 and 42 weeks of pregnancy, all of which are full-term. 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:

1. Calculate based on the expected date of delivery

How to calculate:

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).

28 days is the menstrual cycle = 280 days from the first day of the last period (and then calculated based on the specific number of days in each month).

For example: The first day of my last period was August 10, 2006, so my due date would be May 17, 2007. There is also a simpler Nigel standard: when month ≥ 4, due date = month - 3, time 7; when month ≤ 3, due date = month 9, time 7.

In addition, if the menstrual cycle is not 28 days, adjustments must be made. For example, if the menstrual cycle is 30 days, and the last period was on January 10, 2012, then the due date would be October 19, 2013. Use the formula to calculate month = 1 9, day = 10 7 2.

Accuracy: 95%

It is a method widely used by obstetricians and gynecologists at this stage. However, since many pregnant women do not know their menstrual dates, or their ovulation periods are irregular, this will affect the results. On the contrary, if the menstrual date is accurate, the accuracy of this optimization algorithm reaches 100%.