Here I just wanted to chart fetus crown to rump length (CRL) measurement compared to those of "average" fetuses, data taken from here. From its first ultrasound, Belindy is pretty normal, I conclude.
After GDM, there's another thing that has been occupying the back of my mind. It's Down Syndrome screening test. We are scheduled for an ultra sound and a blood test tomorrow.
This 7-11 week ultrasound will be also used to determine the fetus' nuchal translucency (NT). Here's a graphical explanation of NT I grabbed from this website.
This nice study (I need to find the exact source and link it) nicely summarizes the correlation for Down Syndrome obtained from the so-called combination test. The test consists of a blood test and ultrasound from the first trimester and another blood test from second trimester. PAPP-A is measured from the first trimester blood test. Alpha fetoprotein, estriol, HCG and inhibin A are measured from the second trimester blood test. Only HCG data (not fetoprotein, extriol and inhibin A) along with CRL, and NT length are shown in the table.
Out of these 16 cases, cases 8 and 11 are the only two that are worry-free from Down Syndrome.
My heart is palpating. I hope Belindy is having an NT not higher than 3 mm and that I have a close to 1 MoM PAPP-A tomorrow.
Wish us luck!
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