biophysical profile

PARAMETERS (30 minute observation period):

reactive NST
fetal breathing movement:
- breathing period at least 60 seconds
fetal body movement
- > 3 discrete movements of limbs/trunk
fetal tone:
- upper and lower limbs usually flexed with head on chest
- > 1 episode of extension with return to flexion
amniotic fluid volume:
- largest pocket > 1 cm in vertical diameter without containing loops of cord

score: 2 points if normal; 0 points for abnormal
results:

33% sensitivity; 17% positive predictive value

Yong H. Hahn, MD - 2 February 1995
Last updated: 1 October 2013