Development (1) Reproduction (1) Care (1) Longitudinal studies (1) Methods (1) Specimens (1) Longitudinal studies (1) Indexes (1) Women, White (1) Young women (1) World health (1) Samples (Commerce) (1) Regression analysis (1) Public health (1) Puberty (1) Progesterone (1) Medical sciences (1) Luteinizing hormone (1) Income (1) Hormones, Sex (1) Hormones (1) Gonadotropin (1) Girls (1) Follicle-stimulating hormone (1) Ethnicity (1) Ethnic attitudes (1) Estradiol (1) Discussion (1) Cosmetics (1) Commercial products (1)