Associations between urine phthalate metabolites and thyroid function in pregnant women and the influence of iodine status.

•We investigated the relations between phthalates and thyroid function mid-pregnancy.•We accounted for the urinary phthalate metabolite mixture by factor analyses.•We found relationships between phthalate factors and thyroid function, mainly T3.•Dietary iodine intake in pregnancy influenced some of these relationships.