Gestational age:Time:Pt:^Fetus:Qn:US+Estimated from CRL.Osaka 1989
gestational age:time:pt:^fetus:qn:us+estimated from crl.osaka 1989
Gestational age estimated from Crown rump length on US by Osaka 1989 method
gestational age estimated from crown rump length on us by osaka 1989 method