Estrus response and fertility in postpartum ewes using progesterone and PMSG in tropical environment


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Authors

  • G K DAS
  • S M K NAQVI
  • R GULYANI
  • S R PAREEK
  • J P MITTAL

Keywords:

Estrus, Fertility, PMSG, Postpartum, Progesterone, Sheep

Abstract

Estrus response and fertility were assessed in postpartum (9 weeks) ewes using progesterone in combination with PMSG during winter and summer. Proportion of ewes those exhibited behavioural estrus were 71 %(5/7) and 91 %(10/11) during winter and summer respectively. The onset of estrus was relatively earlier during summer than that in winter. But the difference in mean intervals between seasons was not significant. However, the mean duration of estrus was shorter during winter compared to summer. Out of the ewes bred, the proportion of ewes those lambed at term was significantly higher during winter than that in summer. The present study indicates that use of progesterone in combination with PMSG can be used successfully for induction and synchronization of estrus in postpartum ewes. Better estrus response can be achieved during summer while winter season favours fertility in postpartum ewes.

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Author Biographies

  • G K DAS
    Scientist (Animal Reproduction), Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India


  • S M K NAQVI
    Scientist Senior Scale (Animal Physiology),
    Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India

  • R GULYANI
    Technical Officer, Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India

  • S R PAREEK

    Principal Scientist and Head, Division of Animal Physiology. Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India

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Issue

Vol. 71 No. 12 (2001)

Section

Articles

License

The copyright of the articles published in The Indian Journal of Animal Sciences is vested with the Indian Council of Agricultural Research, which reserves the right to enter into any agreement with any organization in India or abroad, for reprography, photocopying, storage and dissemination of information. The Council has no objection to using the material, provided the information is not being utilized for commercial purposes and wherever the information is being used, proper credit is given to ICAR.

How to Cite

DAS, G. K., NAQVI, S. M. K., GULYANI, R., PAREEK, S. R., & MITTAL, J. P. (2014). Estrus response and fertility in postpartum ewes using progesterone and PMSG in tropical environment. The Indian Journal of Animal Sciences, 71(12). https://epubs.icar.org.in/index.php/IJAnS/article/view/37261