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  • Title: Coupling of fetal movement and fetal heart rate accelerations as an indicator of fetal health.
    Author: Baser I, Johnson TR, Paine LL.
    Journal: Obstet Gynecol; 1992 Jul; 80(1):62-6. PubMed ID: 1603499.
    Abstract:
    OBJECTIVE: The purpose of this study was to determine the clinical value of identified coupling of fetal heart rate (FHR) accelerations (more than five beats per minute for any duration) with objectively detected fetal movements. METHODS: One hundred sixty-six patients underwent routine fetal testing using a Doppler device that recognized both FHR and fetal movements. The coupling index was determined to be the percentage of fetal movements associated with FHR accelerations, and various coupling indices were compared with nonstress test (NST) results. RESULTS: A coupling index above 25% and below 75% compared well with the traditional NST by standard epidemiologic criteria and by the kappa statistic. CONCLUSION: Coupling of even small FHR accelerations and fetal movements could substitute for or replace the NST in antenatal screening.
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