case_images: PMC2778572_01
case_images: Fetal heart rate
  tracings during labor the latent phase of labor showing reassuring fetal heart
  rate patterns in both twins.
case_images: OGI2009-498530.001.jpg
case_images: PMC2778572_01_OGI2009-498530.001.jpg
case_images: fig1
case_images: At this time, the base lines of twins A and B were 150 and 150 bpm, respectively, as shown in Figure 1.
case_images: Fetal heart rate
  tracings during the active phase of labor showing the increased baseline of
  heart rate with variable decelerations in twin A.
case_images: OGI2009-498530.002.jpg
case_images: PMC2778572_01_OGI2009-498530.002.jpg
case_images: fig2
case_images: When the cervix was dilated 8 cm, the membranes of twin A were ruptured.  Within 10-20 minutes, the fetal heart rate of twin A was increased to 170-180 bpm with repeated variable decelerations as shown in Figure 2.
case_images: PMC2778572_02