ESPE Abstracts

Introduction: There are few longitudinal male cohort studies with serial assessments of growth and puberty.Objective: To describe the design and implementation of a longitudinal cohort study of Russian boys evaluated annually for growth, development and puberty.Design/methods: We assembled a multi-disciplinary team of U.S. and Russian researchers to design and conduct a longitudinal boys’ cohort study in Chapaevsk, Russia with...

Background: We are not aware of other longitudinal cohort studies of boys with annual assessments of pubertal development and long term follow-up to adulthood to evaluate semen quality.Objective: To describe semen quality and investigate its predictors in a longitudinal cohort study of Russian boys followed from prepuberty until adulthood.Design and methods: From 2003 to 2005, 516 prepubertal 8–9-year-old boys were enrolled (8...

Background: We are not aware of other longitudinal cohort studies of boys with prepubertal assessment of exposure to endocrine-disrupting chemicals (EDCs) and annual long term follow-up of growth and puberty to evaluate semen quality.Objective: To describe semen quality and explore associations of prepubertal serum concentrations of organochlorine compounds and pubertal measures with semen parameters in an ongoing longitudinal cohort study of Russian boy...