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[Evaluation of Reproductive Health of Chickens and Their Progeny at a Chronic Effect of 131I].

A reproductive health of hens exposed to 131I in a 30-day period with daily quantities ranging from 0.11 to 4.6 MBq/kg and 6 progenies of their offspring was evaluated. We determined that 131I did not change significantly the reproductive potential of hens if administered at a dose of 0.11 MBq, while it raised at 1.1 MBq, progressively decreased after a short-time increase at 2.1 MBq and was inhabited up to its irreversible extinction at 4.6 MBq. Irrespective of the isotope quantity administered, a decline occurred in the birth rate of the progeny where hens dominated in the sex composition. The reproductive potential (i.e., laying capacity) of the offspring of three chicken progenies that had been administered 131I at 0.11 MBq/kg, progenies 3 and 5 that had been administered 1.1 MBq/kg and progeny 1 affected with 2.1 MBq/kg increased, while for chicken progenies 1, 2, 4 and 6 that had been given 131I at 1.1. MBq/kg the reproductive capacity was within the normal range or decreased.