Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from CRL.ASUM 2000
gestational age:time:pt:^fetus:qn:us+estimated from crl.asum 2000
Gestational age estimated from Crown rump length on US by Australian Society of Ultrasound Medicine 2000 method
gestational age estimated from crown rump length on us by australian society of ultrasound medicine 2000 method