Page 58 - 2023 Elctronic Book (3) Normal Labor_Neat
P. 58
▪ When the fetal head reaches the perineum for birth. The occiput passes
under the lower border of symphysis pubis first, and then the head emerges
by extension: First the occiput, then the face, and finally the chin.
6-Restitution.
After delivery of the head, the occiput rotates one eighth of a circle in a direction
opposite to that of internal rotation to undo the twist of the neck caused by internal
rotation.
7-External rotation:
The occiput undergoes another external rotation one-eighth of a circle in the same
direction as that of restitution this is due to internal rotation of the anterior shoulder
one- eighth of a circle. This movement is transmitted to the delivered head. So at the
end the occiput is towards one thigh and the face is towards the outer thigh.
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