Accuracy of ultrasounds for dating

26-Dec-2017 09:46

If your pregnancy has a gestational age of less than eight weeks (between six and eight weeks), a transvaginal ultrasound (inserting the ultrasound probe into your vagina) is usually needed for accurate results.It's important to note that hand-held ultrasound or fetal Doppler may not detect the baby's heartbeat until you are 12 weeks along in your pregnancy.An ultrasound should always detect the baby's heartbeat in a pregnancy that is beyond seven to eight weeks in gestational age.But during the early part of the first trimester, it can be difficult to distinguish an earlier-than-estimated but viable pregnancy from a missed miscarriage.Here's some info about the reliability of ultrasound for different pregnancy concerns.

But sometimes it is possible to confirm a miscarriage based on a single ultrasound.

It's a question that's obviously on the top of every expectant mother's mind: When am I due?