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MECHANISMS OF LABOR (EDFIEREE)

  1. ENGAGEMENT - presenting part of fetus is fixed in true pelvis.
  2. DESCENT - presenting part progresses through pelvis, level os station.
  3. FLEXION - descending head meets pelvic floor, chin is brought down to chest.
  4. INTERNAL ROTATION - fetal head rotates from transverse diameter to antero posterior diameter to facilitate movement through pelvis.
  5. EXTENSION - once fetal head reaches perineum, it extends to be born.
  6. RESTITUTION - after delivery of head, it rotates back to position prior to engagement.
  7. EXTERNAL ROTATION - shoulder engage and move similarly to head.
  8. EXPULSION - entire infant emerges from mother.