Page 207 - ترم ثاني كتاب تمريض صحة الام الكتروني

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▪ The head enter the pelvis in the transverse or diagonal position. When it

reaches the pelvic floor, the occiput is rotated and lies beneath the symphysis

pubis.

5-Extensionof the head:

▪ 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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