Affordable Access

Publisher Website

Effect of abortion on milk production, health, and reproductive performance of Holstein dairy cattle.

  • Keshavarzi, Hamideh1
  • Sadeghi-Sefidmazgi, Ali2
  • Ghorbani, Gholam Reza2
  • Kowsar, Rasoul2
  • Razmkabir, Mohammad3
  • Amer, Peter4
  • 1 Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, PO Box 84156-83111, Isfahan, Iran. Electronic address: [email protected] , (Iran)
  • 2 Department of Animal Sciences, College of Agriculture, Isfahan University of Technology, PO Box 84156-83111, Isfahan, Iran. , (Iran)
  • 3 Department of Animal Science, Faculty of Agriculture, University of Kurdistan, P.O. Box 66177-15175, Sanandaj, Iran. , (Iran)
  • 4 AbacusBio Ltd., Ground Floor, Public Trust Building, 442 Moray Place, P.O. Box 5585, Dunedin, New Zealand. , (New Zealand)
Published Article
Animal reproduction science
Publication Date
Jun 01, 2020
DOI: 10.1016/j.anireprosci.2020.106458
PMID: 32408966


The objective of this study was to identify the effect of abortion on performance of Iranian Holstein cows that calved between 2005-2014. Abortion records were categorized in two groups: 1) new abortion (NLA), and 2) rebreeding abortion (RA). Production data (305-d milk, fat, and protein yields) were analyzed using PROC MIXED, number of inseminations per lactation period (INS), postpartum health disorders (PPHD), and culling records using PROC GLIMMIX, and calving to conception records using PROC PHREG of SAS software (SAS Institute, 2013). For each separate model, main herd-cow factors and all two-way significant interactions were considered in the analyses with results being reported for each calving status by lactation period. In total, 12.5 % of lactation periods were associated with at least one case of abortion, while 1.9 % of the lactation periods commenced with an abortion. Based on results from the present study, milk production decreased for cows having abortion classified as NLA or RA. Overall, when there was a RA, there was an increase in median days non-pregnant (DNP) by 132 d and INS by 1.6, whereas cows with NLA had median DNP of 15 d less and an INS of 0.17 less than cows with normal parturitions. Compared with cows with normal parturitions, cows with a NLA were 1.24, 1.88, and 2.41 times more likely to have PPHD, and be culled from the herd for involuntary reasons and reasons related to reproduction, respectively. The results of this study indicate abortions were associated with cow health and milk production and reproductive performance, indicating losses due to abortion are not only a direct result of the loss of a pregnancy. Copyright © 2020 Elsevier B.V. All rights reserved.

Report this publication


Seen <100 times