<prompt> True about Femur length used as fetal biometric measure is all exceptFemur length used for gestational age estimation has variation of 7 to 11 days in second trimesterForeshortend femur length suggests evaluation for skeletal dysplasiaFemur length doesnt correlate well with BPD and gestational ageFemur length is measured excluding the epiphysis  <response>: Femur length correlates well with BPD and gestational age. 