Correlation of blood biochemical constituents with phases of estrous cycle in Kangayam cows following adoption of estrus induction protocols

Abstract

Blood biochemical parameters in Kangayam cows would provide a baseline data for future infertility diagnostic reference. Apparently healthy Kangayam cows were subjected to estrus induction protocols and fixed time artificial insemination to correlate with the follicular (day of artificial insemination) and luteal (10 days post insemination) phases of the estrous cycle. Non pregnant, pluriparous Kangayam cow (n=70) were equally allotted to control, and different treatment protocols based on the transdermal (PNC based groups) and transvaginal application of progesterone (CIDR based group) with a shot of PGF2α one day preceding the day of progesterone removal. Ovulation was induced either using estradiol benzoate or buserelin acetate. Haematological and biochemical profiles were analysed on the day of progesterone application (APP), removal (REM), AI and 10 days post insemination (10 DPAI). Results indicated that most of the biochemical parameters were high on 10 DPAI than the day of AI. Hence, it was concluded that the changes between the treatment days could be related to the requirement of energy and protein during the follicular and luteal phases of estrous cycle in Kangayam cows.