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| Influences of baseline variability of fetal heart rate on the delivery mode and perinatal outcomes |
| Kunming Maternal and Child Health Care Hospital, Yunnan Province, 650011 |
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Abstract To investigate the influence of baseline variability of fetal heart rate (BFHR) on the delivery mode and perinatal outcomes. Methods: The clinical data of 100 pregnant women with weaken of BFHR (in observation group) and 100 pregnant women with normal BFHR (in control group) from October 2018 to January 2020 were retrospectively analyzed. The results of electronic fetal heart rate monitoring, the NST type, and the oligohydramnios rate were compared between the two groups. These women were followed up to the end of pregnancy, and the delivery mode and the perinatal outcomes were compared between the two groups. Results: There were 67 (67.0%) women with normal NST, 20 (20.0%) women with atypical NST, and 13 (13.0%) women with abnormal NST in the observation group, which had significant different from those (87.0%, 13.0%, and 0%) of the women in the control group (P＜0.05). The incidences of amniotic fluid contamination, oligohydramnios, placental abruption, vela placenta, and racquet placenta of the women in the observation group were 10.0%, 15.0%, 17.0%, 10.0%, and 18.0%, repectively, which were significantly higher than those (0.0%, 2.0%, 2.0%, 0%, and 3.0%, repectively) of the women in the control group. The rates of cesarean section, stillbirth, intrauterine asphyxia, and small gestational age in the observation group were 70.0%, 10.0%, 15.00%, and 16.0%, repectively, which were significantly higher than those (48.0%, 0%, 2.0%, and 0%, repectively) in the control group. The percantages of neonatal blood gas analysis result of pH <7.2 and neonatal Apgar score <7 in the observation group were 13.0% and 36.0%, which were significantly higher than those (0% and 8.0%) in the control group. Logistic analysis showed that the weakened of BFHR was an independent risk factor of adverse perinatal outcomes (β=2.134, P=0.000). Conclusion: The weakened BFHR indicates the possibility of fetal distress in uterus and the higher risk of adverse perinatal outcomes, so the pregnant women with weakened BFHR should be focused on.
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