Estimating Gestational Age.(Brief Article)

What is gestational age? Gestational age is the age of an unborn baby. It is measured in weeks and days, not in months. Since the precise date of conception is seldom known, the age is based on the date of the mother's last menstrual period. Forty weeks after the first day of the last menstrual period is the estimated end of a normal term pregnancy, or due date.

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