Deviation from the type, especially the parent type, in structure, form, physiology, or behavior. [L. variatio, fr. vario, to change, vary]
beat-to-beat v. of fetal heart rate v. of fetal heart rate measured in changes in the QRS-QRS interval from heart beat to heart beat; measured with electronic internal fetal heart rate monitors.
continuous v. a series of very slight v.'s.
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