RESEARCH ARTICLES
11. A study on the factors influencing resumption of postpartum ovarian activity in crossbred cows.
K. Sonam, K. Promod, Leeba Chacko, K.C. Bipin, Lijo John
Journal of Veterinary and Animal Sciences.2020. 51(2):159-163.
Author Details
K. Sonam: PG Scholar, Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Kerala, India.
K. Promod: Associate Professor and Head, Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Kerala, India.
Leeba Chacko: Assistant Professor, Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Kerala, India.
M.P. Unnikrishnan: Assistant Professor, Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Mannuthy, Kerala Veterinary and Animal Sciences University, Kerala, India.
K.C. Bipin: Assistant Professor, Department of Epidemiology and Preventive Medicine, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Kerala, India.
Lijo John: Assistant Professor, Department of Biochemistry, College of Veterinary and Animal Sciences, Pookode, Kerala Veterinary and Animal Sciences University, Kerala, India.
Article History
Received: 17.08.2019, Accepted: 22.10.2019, Published online: 01.07.2020
Corrersponding author: K. Sonam
e-mail: sonamkathane1994@gmail.com
Citation: Sonam, K., Promod, K., Leeba, C., Bipin, K.C. and Lijo, J. 2020. A study on the factors influencing resumption of postpartum ovarian activity in crossbred cows. J. Vet. Anim. Sci. 51(2): 159-163.
Abstract
The aim of the study was to identify the factors influencing postpartum resumption of ovarian activity in crossbred cows. Sixty crossbred cows on day 30 postpartum were selected and the details of age, parity, milk yield, peripartum and postpartum complications were recorded. Animals were examined per rectally from 30 to 90 days postpartum at 12 days interval for the presence of corpus luteum (CL) of any stage during the period of study. Serum progesterone concentrations were estimated and cows which resumed ovarian activity (progesterone concentration >1 ng/mL) at early and late postpartum periods were identified. Association of age, parity, BCS, milk yield and reproductive complications with postpartum resumption of ovarian activity (ROA) at varying periods was analysed. No significant association between ROA and variables such as age, parity. milk yield and reproductive complications were observed. BCS was significantly (P<0.01) associated with ROA. The higher number of animals with postpartum complications belonged to not resumed period than that of early and late resumed periods. The odds ratio for BCS indicated 6.46 times risk for ROA for every unit increase of BCS.
Key words: Animal factors, postpartum dairy cows, resumption of ovarian activity
