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Published on: March 6, 2018
Prenatal exposure to phthalates and emotional/behavioral development in young children
Liron Cohen-Eliraz1, Asher Ornoy2, Eliana Ein-Mor3
1Psychology Department Hebrew University of Jerusalem, Jerusalem, Israel.
Insights
Prenatal exposure to Di-(2-ethylhexyl) phthalate (DEHP) is linked to emotional and behavioral issues in 24-month-old boys. High DEHP exposure in mothers correlated with lower social skills and increased internalizing and externalizing problems in male toddlers.
Area of Science:
- Environmental Health
- Developmental Pediatrics
- Toxicology
Background:
- Endocrine disrupting chemicals (EDCs) like phthalates are ubiquitous environmental contaminants.
- Prenatal exposure to EDCs has been suggested to correlate with adverse neurodevelopmental outcomes, including behavioral difficulties in children.
Purpose of the Study:
- To investigate the association between intrauterine phthalate exposure and the emotional and behavioral development of toddlers at 24 months of age.
Main Methods:
- Maternal urine samples were collected during early gestation (11-18 weeks) and analyzed for phthalate metabolites (DEHP, DiNP, MBzBP).
- Offspring development and behavior were assessed at 24 months using standardized maternal reports (CBCL, ASQ-3, HOME questionnaires).
- Multivariate General Linear Models (GLM) were employed to analyze associations between phthalate metabolite levels and developmental outcomes.
Main Results:
- Maternal exposure to Di-(2-ethylhexyl) phthalate (DEHP) was significantly associated with behavioral and developmental outcomes exclusively in boys.
- Boys with high prenatal DEHP exposure exhibited lower scores in personal-social abilities (ASQ-3) compared to those with low exposure.
- High DEHP exposure in boys was linked to increased internalizing problems (e.g., emotional reactivity, anxiety, depression) and externalizing problems.
Conclusions:
- Maternal DEHP metabolite concentrations in early pregnancy are associated with emotional and behavioral developmental problems in 24-month-old boys.
- These findings support growing evidence of DEHP as a potentially harmful chemical, necessitating environmental vigilance.
- The study highlights sex-specific effects of prenatal phthalate exposure on child development.
Introduction:
Endocrine disrupting chemicals (EDCs) such as phthalates, found in our daily environment, are nowadays suggested to be associated with adverse outcomes. Prenatal exposure was found associated with neurodevelopmental complications such as behavioral difficulties in school age children.
Aim:
To explore the association between intrauterine exposure to phthalates and emotional/behavioral development of 24 months old toddlers.
Methods:
Women were recruited at 11-18 weeks of gestation and provided spot urine samples, analyzed for phthalate metabolites (DEHP, DiNP, MBzBP). Offspring were examined at 24 months of age, using standard maternal report, regarding developmental and behavioral problems (CBCL, ASQ-3, HOME questionnaires) (N = 158). To explore the associations between metabolite levels and developmental outcomes, multivariate GLM analysis (General Linear Model) was used according to tertiles and developmental scores on each developmental outcome.
Results:
Associations of Di-(2-ethylhexyl) phthalate (DEHP) maternal exposure with behavioral-developmental outcomes were found only in boys. Compared with boys with lower DEHP maternal exposure, boys with high DEHP maternal exposure had lower developmental score in personal social abilities in the ASQ-3 questionnaire (50.68 + 8.06 and 44.14 + 11.02, high and low DEHP, respectively, p = 0.03), and more internalizing problems (for example, emotionally reactive score in high and low DEHP: 53.77 + 7.41 and 50.50 + 1.19, respectively, p = 0.029; anxious or depressed score: 53.38 + 5.01 and 50.75 + 1.34, respectively, p = 0.009; and somatic complaints scores 64.03 + 10.1 and 55.84 + 7.84, respectively, p = 0.003), and externalizing problems (49.28 + 8.59 and 43.33 + 9.11, respectively, p = 0.039). No differences were found in the development and behavior problems between high and low DEHP maternal exposure level in girls.
Conclusion:
Maternal DEHP metabolite concentrations measured in first trimester urine was associated with children's emotional/behavioral developmental problems in 24-months old boys, supporting accumulating evidence of DEHP as a potentially harming chemical and call for environmental attention.
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