The widest transverse diameter of the fetal skull is :
Transverse diameters of fetal skull in mechanism of labor are: Biparietal diameter: 9.5cm Super-subparietal: 8.5cm Bitemporal: 8cm Bimastoid: 7.5cm Reference: D C Dutta Textbook of Obstetrics 7th edition,page 85
Biparietal diameter
Occipito-frontal diameter
Bitemporal diameter
Suboccipito-frontal diameter
General obstetrics