Labor and Delivery

• Labor 


  The coordinated sequence of involuntary, intermittent uterine contractions.
• Attitude


  The relationship of the fetal body parts to one another.
• Lie


  Is the relationship of the spine of the fetus to the spine of the mother.
• Presentation


  Is the portion of the fetus that enters the pelvic inlet first.
• Engagement


  When the widest diameter of the presenting part has passed the inlet; corresponds to a 0 station (at ischial spine)