I am 20 weeks pregnant. All first and second trimester screenings/bloodwork have been normal. At my 20 week ultrasound, my OB was concerned because the baby's left lateral ventricle was at the top end of the normal range (measuring 10 mm). The technician measured once (measuring 10mm) and the doctor came in and measure twice. (Once measuring 9mm and the second measuring 8mm). She explained this would be considered "Mild Ventriculomegaly" and advised I return in 4 weeks for another scan. Should this cause concern, and do you think there is anything else I should be asking? I should also mention Baby was in the BREECH position during the entire scan. I would greatly appreciate it. Thanks!