FIGURE 4-7 The fetal head. Bones: two frontal, two temporal, one occipital. Sutures: sagittal, frontal, coronal, lambdoid. Fontanels: anterior, posterior. (Used with permission of Ross Products Division, Abbott Laboratories, Inc., Columbus, OH 43216, Clinical Education Aid No. 13.)

FIGURE 4-8 Categories of fetal presentation, (a) LOA: fetal occiput is in left anterior quadrant of maternal pelvis, (b) LOP: fetal occiput is in left posterior quadrant of maternal pelvis, (c) ROA: fetal occiput is in right anterior quadrant of maternal pelvis, (d) ROP: fetal occiput is in right posterior quadrant of maternal pelvis, (e) LSP: fetal sacrum is in left posterior quadrant of maternal pelvis, (f) Shoulder presentation with fetus in transverse lie. (g) Prolapse of umbilical cord with fetus in LOA position. (Used with permission of Ross Products Division, Abbott Laboratories, Inc., Columbus, OH 43216, Clinical Education Aid No. 18.)