التاثيرات التطورية السمية في صغار الجرذان الرضع من امهات معاملة بالبيتاميثازون

Suckling pups of rats from dams treated with betamethasone 0.3, 0.6, 1.2 mg/kg, i.p. given once daily for 10 consecutive days (first nursing period) demonstrated in a dose – dependent manner significant decreased (P<0.05) the percentage of survival of the pups to weaning, body weight, index of development, whereas brain, heart, kindey, lung,liver / body weight ratio significantly increased (P<0.05) as well as delays in physical maturation (ear opening, fur development, tooth eruption, eye opening) in the pups. Swimming scores on postnatal day 9, 13, 15, 17, 20 was significantly decreased (P<0.05) in offspring from mothers treated with betamethasone 1.2 mg/kg, i.p. In conclusion, the results suggest that betamethasone induced developmental toxic effects in suckling pups exposed to its through the milk. ____________________________________________________________________________