While some animal studies had concerns about early onset of puberty, development of breast tissue, or thyroid cancer, this has not been proven as an issue in humans in those studies. (myorganicformula.com)
Phthalates have been linked to early onset of puberty in girls, obesity, lower sperm count and testosterone level, under - virilized boys, and male genital deformities such as hypospadias (in which the urinary opening is located somewhere besides the head of the penis, like the underside). (ecochildsplay.com)
Since 2008, the use of BPA in baby bottles has dropped out of favor with manufacturers, since BPAs have been associated with leading to certain cancers, disruptive to brain development and the reproductive system, including early onset of puberty. (verywellfamily.com)