Drivers of maternal accumulation of organohalogen pollutants in Arctic areas (Chukotka, Russia) and 4,4'-DDT effects on the newborns.

•High levels of maternal serum organochlorines were found in the Chukotka population.•Most organochlorines were higher in mothers living at the coast than inland.•Age was also a main positive determinant of organochlorine concentrations.•Maternal 4,4′-DDT levels were positively associated with birth weight, length and age.•4,4′-DDT exposure is influencing newborns' growth.