Effects of PCBs (Aroclor 1254) on Reproduction and Growth Rate in Mongolian Gerbils (Meriones Unguiculatus)

Groups of female Mongolian gerbils were subcutaneously administered 2mg or 4mg PCBs (Aroclor 1254) in 0.1ml oil or vehicle only after pairing for two days with untreated males. No effects were found on the number of pairs breeding, birth intervals, number of pups per litter or percentage of male offspring. The preweaning growth rates of the PCBs exposed first litter offspring was retarded, but second litters showed no differences compared to controls. No other differences in growth were observed.