obstetric ultrasound: fetal femur length estimated from gestational age by Merz 1987 method
obstetric ultrasound: fetal femur length estimated from gestational age by merz 1987 method
obstetric ultrasound: fetal femur length estimated from gestational age by Merz 1987 method (procedure)
obstetric ultrasound: fetal femur length estimated from gestational age by merz 1987 method (procedure)