Affiliation:
1. Vitebsk State Academy of Veterinary Medicine
2. Smolensk State Agricultural Academy
Abstract
Under the conditions of industrial technological processes for obtaining milk, the main features of functional disorders of the ovaries were determined in cows, which is manifested by the absence of external signs of oestrus (47.1-62.0%), anovulatory sexual cycles (15.1-20.9%), luteinization of follicles (8.7-16%), luteal cysts (6.0-10.9%), follicular cysts (2.2-3.8%), persistence of corpus luteum (13.1-18.0%). An optimal method for managing the reproductive function for cows with different milk performance has been developed using the new preparation "Oestrobelum D" (cloprostenol-D), which has a high luteolytic effect and is recommended for the induction of oestrus in dairy cows on the 62nd day after parturition. The overall rate of coming in heat (97.6%) and fertility rate (71.2%) after two injections of the drug showed its high target repro-ductive efficiency, which satisfies milk producers in terms of economic significance.
Publisher
Vitebsk State Academy of Veterinary Medicine
Reference10 articles.
1. Effektivnost' preparatov «Fertibel» i «Estrobel D» pri ih ispol'zovanii v skheme programmy «Ovsinh 56» dlya sinhronizacii polovoj ohoty u korov / R. G. Kuz'mich, V. V. YAcyna, D. S. Hodykin, A. A. Garganchuk // Sovremennye cifrovye tekhnologii v agropromyshlennom komplekse : sbornik materialov Mezhdunarodnoj nauchnoj konferencii (30 aprelya 2020 goda). – Smolensk : FGBOU VO Smolenskaya GSKHA, 2020. – T. 1. – S. 103–109.
2. Ovarian and endocrine responses associated with the treatment of cystic ovarian follicles in dairy cows with gonadotropin releasing hormone and prostaglandin F2alpha, with or without exogenous progesterone / D. Ambrose [et al.] // Can Vet J . – 2004. – № 45. – Р. 931–937.
3. Selection of the dominant follicle in cattle: role of estradiol / O. Ginther [et al.] // Biol Reprod. – 2000. – № 63. – Р. 383–389.
4. Postpartum suboestrus in dairy cows: comparison of treatment with prostaglandin F2α or GnRH + prostaglandin F2α + GnRH. In: Fertility in the High Producing Dairy Cow / B. Grimard [et al.] // British Society of Animal Science Occasional Publication. – 2001. – № 26. – Р. 347–352.
5. Repeatability of 2-wave and 3-wave patterns of ovarian follicular development during the bovine estrous cycle / R. Jaiswal [et al.] // Theriogenology. – 2009. – № 72. – Р. 81–90.