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. Author manuscript; available in PMC: 2013 Mar 27.
Published in final edited form as: J Matern Fetal Neonatal Med. 2009 Oct;22(10):905–916. doi: 10.1080/14767050902994663

Figure 1. Amniotic fluid concentration of fragment Bb in normal pregnancies in the mid-trimester and at term, with and without spontaneous labor.

Figure 1

The median amniotic fluid concentration of fragment Bb was higher in women at term not in labor than in those in the mid-trimester [term not in labor: 2.42 μg/mL, interquartile range (IQR) 1.78-3.22 vs. midtrimester: 1.64 μg/mL, IQR 1.06-3.49; p<0.001]. Among women at term, the median amniotic fluid fragment Bb concentration did not differ between patients with spontaneous labor and those not in labor (term in labor: 2.47 μg/mL, IQR 1.86-3.22; p=0.97).