Effects of different regimens of PGF2α treatment during postpartum on reproductive performance in dairy cows

Authors

  • Reza Narenji Sani Semnan University, Faculty of Veterinary Medicine, Department of Clinical Sciences
  • Hamid Reza Mohammadi Semnan University, Faculty of Veterinary Medicine, Department of Clinical Sciences
  • Ali Mahdavi Semnan University, Faculty of Veterinary Medicine, Department of Animal Sciences
  • Hosein Dadashpour Semnan University, Faculty of Veterinary Medicine, Department of Clinical Sciences

DOI:

https://doi.org/10.11606/issn.1678-4456.bjvras.2016.107631

Keywords:

PGF2α, Postpartum, Targeted breeding, Natural mating

Abstract

The aim of this study was to evaluate the effects of early postpartum PGF2α treatment on reproductive performance in dairy cows synchronized with targeted breeding and natural mating after voluntary waiting period. In this experiment, 120 cows were assigned to three groups irrespective of presence or absence of luteal tissue. Cows in PG-14 group were treated with PGF2α from day 14 postpartum, cows in PG-28 group were treated with PGF2α from day 28 postpartum and cows in PG-42 group were not treated with PGF2α until the end of voluntary waiting period (d 42). After day 42 postpartum, cows in three groups were treated with PGF2α within 14-day intervals until natural mating after voluntary waiting period. Recorded reproductive parameters included days to first heat, days to first mating, days open, service per conception, conception rate, percentage of repeat breeder animals and pregnancy loss. Early PGF2α treatment from day 14 postpartum significantly decreased days to first estrus (34.9 ± 0.74, P < 0.003), days to first mating (62.35 ± 1.53, P < 0.04), days open (117.23 ± 3.1, P < 0.001) and service per conception (1.9 ± 0.09, P < 0.02); and PG-14 group presented increased conception rate (52.5%, P < 0.05). The proportion of repeat breeder syndrome tended to be affected by treatment with PGF2α from day 14 postpartum. In conclusion, treatment of cows with PGF2α from day 14 postpartum improved reproductive performance. 

Downloads

Download data is not yet available.

Downloads

Published

2017-02-14

How to Cite

Sani, R. N., Mohammadi, H. R., Mahdavi, A., & Dadashpour, H. (2017). Effects of different regimens of PGF2α treatment during postpartum on reproductive performance in dairy cows. Brazilian Journal of Veterinary Research and Animal Science, 53(4), 1-9. https://doi.org/10.11606/issn.1678-4456.bjvras.2016.107631

Issue

Section

FULL ARTICLE