Biparietal diameter of 9.1 centimeters and femur length of 6.5 centimeters at 35 weeks are normal. Biparietal diameter is the largest distance perpendicular to the midline of the brain, mainly used to detect the development of the fetus, to determine whether there is cephalopelvic disproportion, whether it is possible to deliver, etc., and usually develops to 9 centimeters for maturity. Femur length, as the name suggests, is the length of the fetal femur, which is the longest bone in the human body and usually develops to about 7.4 centimeters by 40 weeks. Biparietal diameter and femur length are different in different pregnancy weeks. 35 weeks of pregnancy belongs to the late stage of pregnancy, with a biparietal diameter of 9.1 centimeters and a femur length of 6.5 centimeters, which are in the normal range. It means that the development of the fetus is good at present, but it is still necessary to have regular obstetric checkups. Pregnant women during pregnancy should pay attention to do a good job of prenatal checkups, actively listen to the advice of professional doctors to do a good job of comprehensive care and health care, pay attention to more rest, at the same time should be relaxed, to avoid nervousness, anxiety, there is any discomfort should be timely to the hospital, by the doctor to clarify the diagnosis and cooperate with the doctor to deal with the symptoms.