The first question any pregnant woman faces, is about the expected date of delivery or simply the due date. Do you know how they calculate the due date? It is calculated by using the first day of the last menstrual period and adding 280 days to it. It is not always possible to know the exact date of ovulation or conception except in the case of test tube babies.
The calculated date is not exact; it is only an assumption so the doctor tells you the expected date and says it could be anywhere between 7 days before or after the due date. According to one study, they found that only 5 percent delivers on their due date. Calculating the due date is very important because as the pregnancy grows it may become more difficult to arrive at the due date. Some woman who have a history of irregular periods, it may not be possible to use the Naegele’s rule to calculate the due date. Then her doctor uses the due date calculated by means of the first trimester ultrasound. If your baby is born before 37 weeks then the labor is considered as preterm labor and the baby is considered as premature.
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