Biparietal diameter in fetuses with spina bifida in first, second and third trimester

Purpose: The measurement of the Biparietal Diameter (BPD) is an intrinsic part of antenatal ultrasound from 10 weeks on until delivery. The aim of the study was to investigate changes in BPD size in fetuses with open spina bifida through all three trimesters. Material and methods: Retrospective data analysis of 84 fetuses with open spina bifida between 11 weeks and 37 weeks of gestation was achieved and the BPD was compared with reference ranges. Z- Score was calculated to eliminate gestational age dependency and facilitate comparision of data. Results: The BPD values in fetuses at 11 – 15 weeks (n = 26) and 15…