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Crown-rump length versus gestational age using a sample of the INTERGROWTH-21st CRL project data. Full title: Crown-rump length (CRL) versus gestational age for creating a size chart (Panel A) and gestational age versus crown-rump length data for creating a dating chart (Panel B) using a sample of the INTERGROWTH-21st project data (~35% of the overall target sample) for CRL from 9+0 to 13+6 weeks gestational age.
