The face and limbs of the fetus are not clearly visible: This depends on the position of the fetus. If the position of the fetus is not good, it is generally difficult to see the face clearly. Sometimes the upper limbs of the fetus will block the face, which will also have an impact. In addition, the doctor has measured the fetal femur length (that is, the length of the thigh bone on one side). The doctor may mean that the ends of the limbs are not clearly visible, that is, the fetal feet and hands, because the fetus in the womb is basically in the shape of a fist, with the toes It cannot be separated, so deformity of the fingers and toes cannot be ruled out. If the doctor's instructions are unclear, it does not mean there is a problem.
From the data, there is nothing obviously wrong with the fetus, except that fetus one (F1) is slightly larger than fetus two (F2), which is not a problem.