CClinical utility

(1) The fetal BPS is noninvasive and highly accurate for predicting the presence of fetal asphyxia. The probability of fetal acidemia is virtually zero when the score is normal (8 to 10). The false negative rate (ie, fetal death within one week of a last test with a normal score) is exceedingly low. The likelihood of fetal compromise and death rises as the score falls.

(2) The risk of fetal demise within one week of a normal test result is 0.8 per 1000 women tested. The positive predictive value of the BPS for evidence of true fetal compromise is only 50 percent, with a negative predictive value greater than 99.9 percent.

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