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661 Abnormality of forces of labor

661.0 Primary uterine inertia Failure of cervical dilation Prolonged latent phase of labor Hypotonic uterine dysfunction, primary

661.00-661.03
661.1 Secondary uterine inertia Arrested active phase of labor Hypotonic uterine dysfunction, secondary

661.10-661.13
661.2 Other and unspecified uterine inertia

661.20-661.23
661.3 Precipitate labor

661.30-661.33
661.4 Hypertonic, incoordinate, or prolonged uterine contractions

661.40-661.43
661.9 Unspecified abnormality of labor

661.90-661.93