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Original Article

Oxytocin, prolactin, milk production and their relationship with personality traits in women after vaginal delivery or Cesarean section

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Pages 49-58 | Published online: 07 Jul 2009
 

Abstract

The aim of the present study was to investigate if personality profiles reflecting anxiety and social interaction of mothers who delivered by Cesarean section (CS) or by the vaginal route (VD) differed in early postpartum and to investigate whether these personality traits were correlated with hormonal data. Seventeen women delivered by emergency CS and 20 by the vaginal route were selected for this study. The amount of milk transferred to the baby was measured. Blood samples were collected during the second breast-feeding on the second day after delivery. The samples were analysed for oxytocin and prolactin. After breastfeeding, the mothers were asked to fill in the personality inventory, Karolinska Scales of Personality (KSP). The scores were compared between the two groups and with a normative group of women. Each scale on the personality inventory was correlated with hormonal parameters. The KSP showed significant differences between the delivered mothers and the normative group in variables related to anxiety and socialization. The VD mothers deviated more than the CS mothers from the normative group. Correlations with hormonal data indicated that anxiety was inversely related with basal levels of oxytocin and prolactin in the CS mothers, whereas the pulsatility of oxytocin was related to social desirability in both groups. Social desirability and oxytocin pulsativity were also correlated with the amount of milk transferred from the mother to the baby. The correlations indicate that central oxytocin, as reflected by basal plasma levels and patterns, may be involved in behavioral adaptations to the maternal role.

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