[Body weight dynamics of laboratory white rats in the postnatal development period].

Abstract

Dynamics of body mass has been followed in 663 noninbred animals from birth up to 3.5 years of age. The rats are kept in vivarium, taking into account necessary demands upon their diet, breeding, amount of the brood and sex dimorphism. The offspring is obtained with a strictly dated time of birth. During the first month of life they are weighed daily (up to… (More)

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