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[0] According to standard professional thinking, nurses should auscultate the fetal heart rate (FHR): [1] Every 15 minutes in the active phase of the first stage of labor in the absence of risk factors. [2] Every 20 minutes in the second stage, regardless of whether risk factors are present. [3] >>Before and after ambulation and rupture of membranes. [4] 
More often in a woman's first pregnancy.
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