ciba foundation colloquia on ageing old age aging animals growth amp development longevity of english thoroughbred horses 47 progeny in samples a and b of parents 16 years old or over 154 lives were obtained with e 16 45 0 62 years which is less than any of the three global means but not sig nificantly so these results taken as a whole seem to afford no good evidence of any consistent effect of parental age on the longevity of mares loo 9 progeny of stallions hermit galorn amp hampton all 412 0 0 0 sire20 yrs 121 fig 3 survival curves of lifetime brood mare rj52rn.jpg from bràzzers ciba xxx View Photo