
They measure EVERYTHING there is to measure. The babys head, ear canal, eyes, intestines, major organs, stomache, they look at how much fluid he will swallow, measure the ammount of fluid, the size of placenta, the umbilical cord, and check it for three sections, the babys femer, pelvis, hands, feet, check the function of the organs in addition to measuring for the size, and they will probably adjust your edd now too, making it a few days sooner or later.