(a) Maternal age
Organochlorine pesticides (OCPs)
New POPs
DDT group
Polychlorinated biphenyls (PCBs)
Indicator congeners
Mono-ortho congeners
Non-classified
(b) Parity
Organochlorine pesticides (OCPs)
New POPs
DDT group
Polychlorinated biphenyls (PCBs)
Indicator congeners
Mono-ortho congeners
Non-classified