Change in the Thyroid Gland’s Linear Dimensions in Sheep’s Postnatal Ontogenesis in Various Natural Conditions
Keywords:
sheep, thyroid gland, right lobe, left lobe, postnatal ontogenesis, growth coefficient, morphometric, absolute index.Abstract
The peculiarities of changes in the absolute width of the thyroid gland of sheep in regions with different iodine content in postnatal ontogenesis have been studied. It was found that the absolute width of the thyroid gland, regardless of the conditions of keeping sheep, increases rapidly from 3 days to 3 months of postnatal ontogenesis, and this process proceeds in stages until the next 60 months. It was found that the absolute parameters of thyroid gland width are higher in sheep of the Ferghana region with high iodine deficiency at the stages of postnatal ontogenesis, especially after 6 months, compared with sheep of the Kashkadarya region.