Accurate dating of pregnancy

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Pregnancy - Pregnant Women - Childbirth -Obstetrics

An ultrasound can help you determine how far along you are in your pregnancy.

Pregnancy - pedia

Before you consider abortion or seek an abortion clinic, it is important to know how many weeks pregnant you are (the gestational age).

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How do you date a pregnancy?

Even when you can remember when your last menstrual period began, ultrasound can still be more accurate than relying on your last period date alone.

Dating the Beginning of Pregnancy

The American College of Obstetricians and Gynecologists state the following: “Ultrasound measurement of the embryo or fetus in the first trimester (up to and including 13 6/7 weeks gestation) is the most accurate method to establish or confirm gestational age” (Committee Opinion, No. Even though using your last period date (LMP) is a traditional dating method, the accuracy of this practice depends on a regular menstrual cycle of 28 days, with ovulation occurring on the 14th day of the cycle.


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