Worried about our baby having a short femur i have a question regarding how they

Zac S

New member
measure? WE went to a place that did ultra sounds so we could find out the gender of the baby early. My wife is 17 weeks pregnant but they said that the femur measured 15 weeks and 4 days. As many of you know a short femur puts the baby at a higer risk of having Downs Syndrome. My question is this... DO they measure according to the definition of a fetus which would not account for the 2 weeks it was an embryo and not a fetus?
 
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