“…Under “data collection,” Chen-Patterson et al mention that “medical information included birthweight” but they appear to share no results on this variable [ 1 ]. Birthweight data from lean girls with adolescent PCOS would be welcome, given that their average weight at term birth may have been below the mean for girls in a contemporary US cohort [ 2 , 3 ]. Birthweight data from adolescents with PCOS and obesity would also be welcome, given that these girls are at an 18-fold higher risk of developing type 2 diabetes [ 4 ], and that such development depends on interactions among genetic risk, prenatal weight gain, and postnatal BMI [ 5 ].…”