How accurate are sonograms for dating pregnancy

Ultrasound is an amazing tool for tracking the development of a pregnancy, and it gives doctors a lot of useful information for providing optimal prenatal care.

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But ultrasounds are not 100 percent reliable for everything they measure.

The accuracy of an ultrasound test can vary based on factors such as the stage of the pregnancy, the quality of the machine, the skill of the practitioner, and the position of the baby in your womb.

Here's some info about the reliability of ultrasound for different pregnancy concerns.

When you've finished looking at these topics, you may enjoy looking at our collection of ultrasound photos week by week through pregnancy.

The length of your pregnancy is calculated from the first day of your last menstrual period (LMP), even though you don't actually conceive until 14 days after your LMP, and later than this if your cycle is longer than 28 days.

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