Values of percentile 5, 10, 25, 50, 75, 90, and 95 for the cervical length according to gestational age at measurement
sPTB

As a presumable consequence, considering two gestational ages intervals at measurement (18–20 vs. 21–22 weeks), we identified an increase in sensitivity to predict sPTB < 37 during 21 to 22 weeks (
