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Table 3 Day: night differences in fetal heart rate (FHR) parameters with respect to sex

From: Circadian changes and sex-related differences in fetal heart rate parameters

 

Male (n = 30)

Female (n = 24)

P value

Change in bFHR (bpm)

−7.3 [−3.3, −14.0]

−5.7 [+1.0, −15.6]

>0.4

Change in STV (ms)

1.2 [3.1, 0.2]

0.6 [1.6, −1.1]

0.076

Change in LTV (ms)

7.7 [17.6, 5.0]

3.5 [7.5, −5.6]

0.010

Change in RMSSD (ms)

0.0 [1.3 -1.3]

−0.31 [0.4, −1.5]

>0.2

  1. Data are shown as mean median [IQR]
  2. The day: night change in all measures of FHR variability was greater in male than female fetuses; this difference was significant with respect to long-term variation (LTV)
  3. bFHR basal fetal heart rate, STV short term variation, LTV long term variation, RMSSD root mean square of successive differences
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Maternal Health, Neonatology and Perinatology

ISSN: 2054-958X

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