Labor and delivery complicated by abnormality of fetal acid-base balance

**Inclusion terms:** - Fetal acidemia complicating labor and delivery - Fetal acidosis complicating labor and delivery - Fetal alkalosis complicating labor and delivery - Fetal metabolic acidemia complicating labor and delivery

**Excludes1:** - fetal stress NOS (O77.9) - labor and delivery complicated by electrocardiographic evidence of fetal stress (O77.8) - labor and delivery complicated by ultrasonic evidence of fetal stress (O77.8)

**Excludes2:** - abnormality in fetal heart rate or rhythm (O76) - labor and delivery complicated by meconium in amniotic fluid (O77.0)