If the fetus is 30 weeks pregnant and has a biparietal diameter of 79 mm and a femur length of 61 mm, the fetus is developing normally.
Biparietal diameter is the widest distance between the right and left sides of the head of the fetus, also known as the large transverse diameter of the head; femur length refers to the length of the fetus’s thigh bone, which is a predictor of the fetus’s body mass. Based on the measured biparietal diameter and femur length, doctors can determine the weight and development of the fetus.
If the biparietal diameter of the fetus at 30 weeks of pregnancy is in the range of 7.83-0.62cm～7.83+0.62cm, then the biparietal diameter of 79mm is normal; if the femur length of the fetus at 30 weeks of pregnancy is in the range of 5.77-0.47cm～5.77+0.47cm, then the femur length of 61mm is normal.
Fetal development in 30 weeks of pregnancy with a biparietal diameter of 79mm and a femur length of 61mm is normal.
Whether the development of the fetus is normal or not needs to be judged by a specialist in the hospital.