Prenatal stress and mixed-handedness.

Contains fulltext : 52230.pdf (publisher's version ) (Closed access)Atypical lateralization, as indicated by mixed-handedness, has been related to diverse psychopathologies. Maternal prenatal stress has recently been associated with mixed-handedness in the offspring. In the present study, this relationship was investigated further in a prospective, methodologically comprehensive manner. Stress levels were determined three times during pregnancy by means of questionnaires and measurements of cortisol levels. The handedness of 110 6-y-old children (48 boys) was determined by independent observers. Mixed handedness was defined as using the opposite hand for one or more of the tested activities. Logistic regression analysis showed that more maternal daily hassles in late pregnancy and maternal mixed-handedness increased the chance of mixed-handedness in the offspring. In contrast, more pregnancy-related fear in late pregnancy and a longer duration of gestation were associated with a smaller chance of being mixed-handed. Prenatal stress measured during the first two periods of pregnancy or determined by cortisol was not related to mixed-handedness in the offspring. In conclusion, reported and physiologic measures of prenatal stress in a moderately stressed pregnant population were only partly related to offspring mixed-handedness

Maternal prenatal stress and 4-6 year old children’s salivary cortisol concentrations pre- and post-vaccination

Contains fulltext : 54819.pdf (publisher's version ) (Open Access)In this study influences of maternal prenatal stress on the cortisol reactions of children to a vaccination were determined. Prenatal stress at around 16 weeks of gestation was measured through questionnaires and a cortisol day curve. Cortisol reactions were determined preceding and following the vaccination. A total of 24 children (age between 3.11 and 5.9 years, mean age 4.9 years) and their mothers participated in this study. Multilevel analysis (hierarchical linear modelling) was used to analyze the data. Children of mothers who had higher concentrations of morning cortisol during pregnancy had higher concentrations of cortisol as compared to children of mothers who had lower concentrations of morning cortisol. Furthermore, more daily hassles and a higher level of fear of bearing a handicapped child during pregnancy were associated with higher concentrations of cortisol in the children.4 p

The effects of prenatal stress on temperament and problem behavior of 27-month-old toddlers.

Contains fulltext : 48372.pdf (publisher's version ) (Closed access)AIM: To examine, in a prospective study, the influence of prenatal stress on infant temperament and problem behavior. METHOD: Self-report data on stress and anxiety, and levels of cortisol in saliva were collected from nulli-parous women during pregnancy. Temperament of the child was measured at 27 months by parent report on the Infant Characteristics Questionnaire. Behavior of the child was assessed by direct observation during the administration of the Bayley Scales of Development 2-30, and by parent report on the Child Behavior Checklist 2-3. RESULTS: Complete data were available for 103 healthy toddlers. Logistic regression analyses were performed and results were adjusted for possible prenatal, perinatal and postnatal confounders. Perceived stress during pregnancy was a predictor of lower levels of restless/disruptive temperament (OR=0.77), more total behavioral problems (OR=1.17), and more externalizing behavioral problems (OR=1.12) in 2-year-olds. Fear of bearing a handicapped child was a predictor of higher levels of restless/disruptive temperament (OR=1.39) and more attention regulation problems in toddlers (OR=1.46). CONCLUSIONS: Increased levels of maternal prenatal stress appear to be associated with temperamental and behavioral problems in toddlers