Gestational age:Time:Pt:^Fetus:Qn:US.estimated from radius length.Merz 1987
gestational age:time:pt:^fetus:qn:us.estimated from radius length.merz 1987
Gestational age estimated from Radius length by method of Merz 1987 (US)
gestational age estimated from radius length by method of merz 1987 (us)