First trimester dating ultrasound accuracy

It is not uncommon for babies that are labeled “Large for Gestational Age (LGA)” and “Intra Uterine Growth Restriction (IUGR)” to have monthly or even weekly ultrasounds during the pregnancy.

When an ultrasound is performed, measurements of the head, abdomen, thigh, and amount of amniotic fluid are done.

The differences between boy and girl ultrasound photos are plenty.

When looking at an ultrasound photo and trying to decide if you are looking at a girl ultrasound photo, there are a couple of things to keep in mind: Although you may be able to determine your baby's gender from an ultrasound, mistakes can be made.

Manzanares S, Benítez A, Naveiro-Fuentes M, López-Criado MS, Sánchez-Gila M.

Accuracy of fetal sex determination on ultrasound examination in the first trimester of pregnancy.

Then your baby at 37 weeks will have bigger measurements than babies destined to weigh seven or eight pounds at birth.

The computer in the ultrasound (ignorantly) lumps your bigger baby into the dates of babies that big in the “normal” population.

However, if you have a larger than average baby, the ultrasound will apply the husky figures to the “normal” measurements.

With my first, even though based on the days I had implantation bleeding my due date should have been July 11, the second trimester ultrasounds gave me a due date of July 5.

Of course, baby didn't come until July 13, so I think my due date had been about the 11th all along!

I'm wondering if any ladies have had experience with the accuracy of a first trimester dating ultrasound.

When I got my dating ultrasound one week ago, they estimated I was 8 weeks 0 days, making my due date Feb 1.

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