The mechanisms of labor (memorize EDFIERRE) comprises of the following:
Engagement - presenting part of the fetus is fixed in true pelvis
Descent - presenting part progresses through pelvis; level os station
Flexion - descending head meets pelvic floor; chin is brought down to chest
Internal Rotation - fetal head rotates from transverse diameter to anteroposterior diameter to facilitate movement through pelvis
Extension - once fetal head reaches perineum, it extends to be born
Restitution - after delivery of the head, it rotates back to position prior to engagement
External Rotation - shoulder engage and move similarly to head
Expulsion - entire infant emerges from mother
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