Normal Fetal HR
100-160
Causes of brady cardia
Increased vagal tone
Maternal BB use
Causes of tachycardia
Maternal Pyrexia
Chorioamnionitis
Hypoxia
Prematurity
Normal Variability
> 5 beats per minute
Causes of baseline variability <5/min
Hypoxia
Prematurity
Early decelleration meaning and Causes
HR lowering at onset of contracition and resumes when ends
Innocuous
Head compression
Late decelleration meaning and Causes
HR reduction after onset of contraction and resumes 30 seconds after end of contraction
Fetal asphyxia or placental insufficiency
Variable Decelerations meaning and Causes
HR lowering sporadically
Cord Compression