A 5-year-old girl was brought to Department of Pediatric Endocrinology and Diabetes for premature breast development since 4 months. Her medical antecedents and family history were uneventful. From investigations she was diagnosed as a case of central precocious puberty. Identification of pesticides in farms surrounding their house indicates that this early stimulation of the hypothalamic-pituitary-gonadal axis was linked to the estrogen-like activity of endocrine-disrupting compounds.