Fig. 2From: Adherence to Swedish national pregnancy dating guidelines and management of discrepancies between pregnancy dating methods: a survey studyEstimated percentage of pregnancy dating ultrasound examinations performed in the first trimester instead of the second trimester during the years 1997–2016 based on the 19 answers covering the entire time. The thin line represents an approximation of the mean percentage of first-trimester pregnancy dating ultrasounds for each year, based on the median value for each category definitionBack to article page