Pregnant dating scan accuracy

They're a safe way to check up on your baby - plus, they give parents an exciting glimpse of what's going on inside!Ultrasound scans use sound waves to create an image of your baby in the womb. Most hospitals offer at least two ultrasound scans during pregnancy.Using the LMP for dating does not account for inaccurate recall of the LMP or irregular cycles.

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.

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

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

Your partner should be able to come with you, if you like, and you may even be able to get a printout of the scan to take home with you.

Nuchal translucency (NT) is a way of estimating the risk of Down's syndrome and other chromosomal abnormalities.


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