This document summarizes the anatomical characteristics of the fetal head and maternal pelvis that are important for childbirth. It describes the bones, sutures, fontanelles, and diameters of the fetal head. It then outlines the bony landmarks and clinical measurements taken of the maternal pelvis, including the inlet, mid, and outlet planes. Engagement and station of the fetal head during labor are also defined.

14. Nasion:The root of the nose Glabella:the elevated area between the orbital ridges Sinciput: the area between the anterior fontanelle and the glabella Anterior fontanelle:diamond shaped Vertex:between the fontanelles and bounded laterally by the eminences Posterior fontanelle:Y or T shaped Occiput:behind and inferior to the posterior fontanelle and lambdoid sutures

16. Suboccipitobregmatic (9.5cm) From the undersurface of occipital to the center of the ant fontanelle Occipitalfrontal(11cm ) From external occipital protuberance to the glabella Supraoccipitomental (13.5cm) From the vertex to the chin Submentobregmatic (9.5cm) From the junction of the neck and lower jaw to the center of the ant fontanelle

17. Biparietal (9.5cm) largest Extend between the parietal bones Bitempotal (8cm) shortest Extend between the temporal bones

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19. Maternal pelvis

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