Veterinary Archives, Vol. 86 No. 5, 2016.
Original scientific paper
The effect of parity on metabolic profile and resumption of ovarian cyclicity in dairy cows.
Ivan Folnožić
; Clinic for Obstetrics and Reproduction, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Romana Turk
; Department for Pathophysiology, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Dražen Đuričić
; Veterinary Practice Đurđevac, Đurđevac, Croatia
Silvijo Vince
; Clinic for Obstetrics and Reproduction, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Zlata Flegar-Meštrić
; Clinical Hospital Merkur, Zagreb, Croatia
Przemysłav Sobiech
; Department for Internal Diseases, Faculty of Veterinary Medicine, University of Warmia and Mazury, in Olsztyn, Olsztyn, Poland
Martina Lojkić
; Clinic for Obstetrics and Reproduction, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Hrvoje Valpotić
; Department for Nutrition and Animal Husbandry, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Marko Samardžija
orcid.org/0000-0003-0402-3173
; Clinic for Obstetrics and Reproduction, Faculty of Veterinary Medicine, University of Zagreb, Zagreb, Croatia
Abstract
The aims of the present study were to investigate the effect of parity on the resumption of ovarian cyclicity and to characterize metabolic factors affecting ovarian cyclicity. The study was conducted on a total of 24 Holstein-Friesian dairy cows. The cows were divided into 2 groups comprising 12 animals each, according to parity as primiparous or multiparous. The serum samples were analysed for the indicators of metabolic status: non-esterfied fatty acids (NEFA), beta-hydroxybutyrate (BHB), glucose, triglycerides, total cholesterol, and high density lipoprotein (HDL)-cholesterol. The resumption of ovarian cyclicity was determined by progesterone concentrations and gynaecological examination. The concentrations of HDL-C and NEFA were either significantly higher or lower, respectively, in relation to the resumption of ovarian cyclicity. These findings suggested that overcoming the negative energy balance (NEB) is the most important prerequisite for determining the resumption of ovarian cyclicity. This study also revealed a significantly longer period until the first service in primiparous cows as compared to multiparous cows. In conclusion, the primiparous cows were more susceptible to metabolic stress during the transition period, and their metabolic and endocrine profiles were more unbalanced compared to the multiparous cows.
Keywords
negative energy balance; parity; ovarian cyclicity; dairy cows
Hrčak ID:
167550
URI
Publication date:
23.9.2016.
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