The development of fetal heart rate patterns during normal pregnancy.

  title={The development of fetal heart rate patterns during normal pregnancy.},
  author={M. D. Pillai and David K. James},
  journal={Obstetrics and gynecology},
  volume={76 5 Pt 1},
Characteristics of the fetal heart rate (FHR) were studied longitudinally throughout the second and third trimesters in 43 low-risk singleton fetuses. The second trimester was characterized by an FHR pattern showing minimal differences between quiet and active intervals of fetal behavior. Few movements were accompanied by accelerations of small magnitude. Brief decelerations of variable magnitude exceeded the number of accelerations, and their frequency declined with advancing maturity. The… CONTINUE READING

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