Maternal and umbilical artery cortisol at birth: relationships with epidural analgesia and newborn alertness.
2012
Background: Newborn alertness soon after birth facilitates mother–infant interaction and may be related to umbilical cortisol levels. Yet, little is known about whether epidural analgesia influences umbilical cortisol at birth. Aim: The aims of this study were to explore relationships between exposure to epidural analgesia and maternal and umbilical cortisol; maternal and umbilical cortisol levels at birth; and umbilical cortisol and infant alertness after birth. Method: Forty women were self-selected to unmedicated or epidural labors in this pilot study. Maternal saliva and infant umbilical artery (UA) plasma at birth were enzyme immunoassayed for cortisol. Infant alertness was assessed nearly 1 hr after birth. Results: Maternal cortisol was higher in the unmedicated versus epidural group (p = .003). Umbilical cortisol was not related to epidural analgesia exposure but was related to duration of labor (higher cortisol with longer labors; p = .026). Maternal cortisol level explained 55% of the variance in...
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