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To investigate whether exposure to high maternal concentrations of 25(OH)-vitamin D in pregnancy poses any risk to the child.Prospective study.Princess Anne Maternity Hospital, Southampton, UK.A group of 596 pregnant women were recruited. A total of 466 (78%) children were examined at birth, 440 (74%) at age 9 months and 178 (30%) at age 9 years.Maternal 25 (OH)-vitamin D concentrations were measured in late pregnancy. Anthropometry of the child was recorded at birth, 9 months and 9 years. At 9 months, atopic eczema was assessed. At 9 years, children had an echocardiogram and a dual energy x-ray absorptiometry scan, blood pressure, arterial compliance and carotid intima-media thickness were measured and intelligence and psychological function assessed.There were no associations between maternal 25(OH)-vitamin D concentrations and the child's body size or measures of the child's intelligence, psychological health or cardiovascular system. Children whose mothers had a 25(OH)-vitamin D concentration in pregnancy >75 nmol/l had an increased risk of eczema on examination at 9 months (OR 3.26, 95% CI 1.15-9.29, P=0.025) and asthma at age 9 years (OR 5.40, 95% CI, 1.09-26.65, P=0.038) compared to children whose mothers had a concentration of <30 nmol/l.Exposure to maternal concentrations of 25(OH)-vitamin D in pregnancy in excess of 75 nmol/l does not appear to influence the child's intelligence, psychological health or cardiovascular system; there could be an increased risk of atopic disorders, but this needs confirmation in other studies.

Original publication

DOI

10.1038/sj.ejcn.1602680

Type

Journal article

Journal

European journal of clinical nutrition

Publication Date

01/2008

Volume

62

Pages

68 - 77

Addresses

MRC Epidemiology Resource Centre, University of Southampton, Southampton General Hospital, Southampton, UK. drg@mrc.soton.ac.uk

Keywords

Princess Anne Hospital Study Group, Humans, Asthma, Dermatitis, Atopic, Vitamin D Deficiency, Vitamin D, Pregnancy Outcome, Cohort Studies, Longitudinal Studies, Prospective Studies, Child Development, Nutritional Status, Pregnancy, Child, Infant, Infant, Newborn, Female, Male, Maternal Nutritional Physiological Phenomena