A PubMed abstract on evidence that environmental chemicals (ECs) including endocrine-disrupting compounds (EDCs) can alter female reproductive development, fertility with origins during foetal development.
Increased Serum Estrogenic Bioactivity in Three Male Newborns With Ambiguous Genitalia: a Potential Consequence of Prenatal Exposure to Environmental Endocrine Disruptors
A PubMed abstract on anomalies of male sexual differentiation in the last 15 years in both wildlife and the connection with environmental endocrine disruptors - i.e. micropenis, cryptorchidism, and isolated or associated hypospadias.
An American Journal of Human Biology study on how much variance there is within male (XY) and female (XX) chromosomes.
A MedlinePlus article on the definition, cause, symptoms and treatment of intersex.