Морфофункциональная характеристика яичников самок овец западно-сибирской мясной породы в возрастном аспекте

Morphofunctional structure of ovaries is changeable. The knowledge of ovarian structure, topography and functional features in ewes over different physiological stages enables identifying a healthy condition, diagnosing reproductive and gynecologic pathologies and taking them into account in sheep selective breeding. The research goal was to study age-related ovarian morphofunctional features of West-Siberian mutton ewes. The study revealed mature tertiary follicles, corpus luteum and interstitial glands which were indicative of puberty beginning at the age of 4 months and sexually mature state by the age of 6 months. The traces of glycogen, acid and neutral sulfated glycoproteins were found in the cytoplasm of the primordial and primary follicles of the ewes at the neonatal period up to the age of 4 months. RNA increases during the follicular epithelium growth and the follicular maturation because RNA is used as a source of energetic and plastic material for the biochemical processes in the actively growing cells. Crude protein and lipids were found in a large amount in the follicular fluid and the cytoplasm of follicular cells. The amount of glycogen in cytoplasm of primary and secondary follicles increases from the age of 4 months up to the age of 12 months. The amount of acid and neutral sulfated glycoproteins in the follicular epithelium and the pellucid zone increases from 4 to 6 months during the growth of follicles. The amount of acidic and neutral sulfated glycoproteins is moderate in older ewe follicular epithelium. The amount of RNA of 4 through 12 month old ewes does not change. The concentration of crude protein and lipids decreases slightly.