Gynaecology & Obstetrics General fba01264 The widest transverse diameter of the fetal skull is A Biparietal diameter B Occipito-frontal diameter C Bitemporal diameter D Suboccipito-frontal diameter High-Yield Explanation Transverse diameters of fetal skull are Biparietal diameter: 9.5cm Super-subparietal: 8.5cm Bitemporal: 8cm Bimastoid: 7.5cm