Accuracy of ultrasounds for dating
That's why doctors often need two consecutive scans to diagnose miscarriage.
But sometimes it is possible to confirm a miscarriage based on a single ultrasound.
You may be wondering this about your due date, your baby's gender or more serious things like a miscarriage diagnosis.
First, let's quickly go over the basics of ultrasound.
An ultrasound—also known as a sonogram—uses sound waves to produce a picture of your baby in the womb.
These pictures show up on a computer screen at your bedside during the test.
In your later second (after 20 weeks), and especially in your third trimester, your estimated due date shouldn't change based on an ultrasound because it will be less accurate.
And remember: It's an due date; the vast majority of women don't deliver their babies the day they're due.
If you still have questions, learn more about the accuracy of ultrasound in predicting your due date.
Other tools, such as checking your h CG level, are usually used along with an ultrasound Learn more about the accuracy of ultrasound in diagnosing a miscarriage, and how ultrasound may be used along with other tools to learn if a baby has miscarried.