Patient's question:
I recently had an ultrasound examination, and it showed OFD. What is the meaning of OFD in an ultrasound?Doctor's answer:
OFD, also known as the occipitofrontal diameter, is the distance from the root of the nose to the occipital protuberance. It is also referred to as the anteroposterior diameter. The fetal head engages through this diameter, and at full term pregnancy, the average value is 11.3 centimeters. OFD is a commonly used indicator for doctors to observe fetal development during prenatal examinations using ultrasound.Femur length refers to the length of the thigh bone. The thigh bone is the length from the root of the thigh to the knee.