Age morphology of the uterus of large cornated Holstin cattle

The purpose of the study was to identify age-related features of the anatomical structure of the uterus in Holstein heifers. It has been established that the growth of the heifer uterus and its structural parts in postnatal ontogenesis has a pattern. In the first three months, the weight of the uterus increases by 2.2 times, and by the age of six months by 8.2 times. At the age of six months, the morphology of the uterus has a definitive structure; subsequently, by the age of 12 months, the morphogenesis of the uterine section does not have significant differences. The histological structure of the uterine wall reflects the patterns of growth rate of uterine mass in relation to the age of the heifers.