Dynamics of micromorphology of the thyroid gland of pigs in regional biogeochemical conditions

In the biogeochemical conditions of the Chuvash the Center and South-East identified the cause-and-effect relationship of the application to boars and hogs of bioprepations "Trepel" and "Suvar" with ontogenetic features with morphophysiological reaction of their thyroid gland in the different periods of postnatal ontogenesis.