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Table 3 Birth/placental weight ratios, umbilical cord blood PO2 (mmHg), O2 saturation (%) and fractional O2 extraction values in all patients

From: Fetal sex impacts birth to placental weight ratio and umbilical cord oxygen values with implications for regulatory mechanisms

 

Males N = 35,749

Females N = 34,087

Birth/placental weight

5.27 ± 0.85

5.18 ± 0.84***

Umbilical vein PO2

27.3 ± 6.5

27.7 ± 6.4***

Umbilical artery PO2

15.4 ± 5.4

15.2 ± 5.2***

Umbilical vein O2 saturation

60.4 ± 16.1

61.7 ± 15.6***

Umbilical artery O2 saturation

25.8 ± 12.8

25.4 ± 12.3***

Fractional O2 extraction

0.57 ± 0.17

0.58 ± 0.16***

  1. Data presented as means ± SD; ***p < 0.001 vs respective Male value adjusting for the effect of parity, smoking, chronic and pregnancy-induced hypertension, gestational and overt diabetes, gestational age at delivery, and maternal body mass index for birth/placental weight, and additionally for anesthetic use, delivery type and non-reassuring FHR for cesarean delivery for the O2 measurements
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Biology of Sex Differences

ISSN: 2042-6410

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