In utero exposure to atrazine analytes and early menarche in the Avon Longitudinal Study of Parents and Children Cohort

•Associations between atrazine analytes and puberty have not been investigated in humans.•In utero exposure to Diaminochlorotriazine (DACT) and early menarche in girls is examined.•A weak, non-significant association between DACT and early menarche was observed.•In a subset of girls without missing data, the association was significant.