Volume: 51 Issue: 2
Year: 2020, Page: 159-163,
Received: Aug. 17, 2019 Accepted: Oct. 22, 2019 Published: July 1, 2020
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.
Keywords: Animal factors, postpartum dairy cows, resumption of ovarian activity
Bulman, D.C. and Lamming, G.E. 1978. Milk progesterone levels in relation to conception, repeat breeding and factors influencing acyclicity in dairy cows. J. Reprod. Fert. 54: 447- 458.
Butler, W.R. and Smith, R.D. 1989. Interrelationship between energybalance and postpartum reproductive function in dairy cattle. J. Dairy Sci. 72: 767-783.
Gillund, P., Reksen, O., Grohn, Y.T. and Karlberg, K. 2001. Body condition related to ketosis and reproductive performance in Norwegian dairy cows. J. Dairy Sci. 84: 1390-1396.
Jainudeen, M.R., and Hafez, E.S.E. 2000. Reproductive failure in females. In: Hafez and Hafez, 2000. Reproduction in Farm Animals. (7th Ed.). Lippincott Williams and Wilkins. Philadelphia, USA.
Mateus, L., Da Costa, L.L., Bernardo, F. and Silva, R.J. 2002. Influence of puerperal uterine infection on uterine involution and postpartum ovarian activity in dairy cows. Reprod. Domest. Anim. 37: 31-35.
Morrow, D.A., Roberts, S.J. and McEntee, K. 1969. Postpartum ovarian activity and involution of the uterus and cervix in dairy cattle. II: Involution of uterus and cervix. Cornell Vet. 59: 190-198.
Opsomer, G., Coryn, M., Deluyker, H. and de Kruif, A. 1998. An analysis if ovarian dysfunction in high yielding dairy cows after calving based on progesterone profiles. Reprod. Domest. Anim. 33: 193- 204.
Opsomer, G., Grohn, Y.T., Hertl, J., Coryn, M., Deluyker, H. and de Kruif, A. 2000. Risk factors for postpartum ovarian dysfunction in high Producing dairy cows in Belgium: a field study. Theriogenology. 53: 841-857.
Smijisha, A. S. 2012. A body condition score system for predicting performance of cross bred cattle. PhD Thesis, Kerala Veterinary and Animal Sciences University, Mannuthy, 4p.
Zain, E.D., Nakao, T., Abdel Raouf., M., Moriyoshi, M., Kawata, K. and Moritsu, Y. 1995. Factors in the resumption of ovarian activity and uterine involution in postpartum dairy cows. Anim. Reprod. Sci. 38: 203-214.
Zraly, Z., Kummer, V. and Caderle, J. 1989. Activity of the ovarian follicle system in cows with various puerperal courses. Vet. Med. 34: 593-602.
: © 2020 Sonam et al. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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.