Year-end Sale % OFF 
Abstract
Post-calving anestrus leads to serious economic losses and is the reason for the animal culling. Deficiency of estrogen and hypofunctional state of the ovaries due to negative energy balance, as well as violations of the timing of postpartum involution of the uterus are considered the leading causes of an extended anovulatory period in fresh cows. A comparison was made of the therapeutic efficacy of Ovsynch scheme and Ovariovit preparation when used in first heifers with post-calving anestrus against the background of ovarian hypofunction. When using Ovsynch scheme, the fertility of the first insemination was 50%; estrous cyclicity recovered in 80% of first heifers. When using Ovariovit, the fertility of the first insemination was 60%; the estrous cycle was restored in 100% of first heifers.
Highlights
Post-calving anestrus has common occurrence in dairy farms
Long service period leads to serious economic losses and is the reason for animal culling, reduces the period of their economic use
In the control group all the animals showed oestrum after 10 days after treatment according to Ovsynch scheme; during rectal and ultrasound examination, a growing dominant follicle was found in one of the ovaries
Summary
Post-calving anestrus has common occurrence in dairy farms. Even in the absence of postpartum complications, the lactation dominant significantly suppresses the reproductive function of a highly productive cow in the first months after calving. The first wave of follicular growth after calving appears on days 5-7 and ovulation of the first dominant follicle should occur by 18-20 days, and, signs of estrus should appear (1). In those cases when a cow does not come to oestrum for a long time, it signals post-calving anestrus. With a lack of energy in the body, the secretion of gonadotropins decreases, which in turn negatively affects the ability of the follicles to produce estradiol, which is necessary for their maturation and ovulation; the timing of the first ovulation, and the estrus, is significantly lengthened [3, 4]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
