Progesterone supplementation to improve fertility of selected subgroups of lactating cows during the summer and fall

Zvi Roth, Omri Shiff, Yaniv Lavon, Dorit Kalo, David Wolfenson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

One major cause of low fertility of cows in the summer is progesterone deficiency. We found that insertion of a controlled intravaginal drug-releasing (CIDR) device containing progesterone after artificial insemination (AI) increases pregnancy per AI (P/AI) in cows with uterine disease and low body condition score after calving. Here, we treated only these two subgroups, during the summer and autumn. Control (n = 191 AI) and treatment (n = 230 AI) cows were inseminated at estrus and the treated group received a CIDR device on day 5 post-AI, for 14 days. Overall analysis of data during the summer and autumn indicated no significant differences between treatment and control groups. Analysis of the summer data only indicated a significant effect of treatment: P/AI was higher in CIDR-treated vs. control groups (34.2% vs. 19.3%; p <.038). Results indicated a 15% increase in P/AI during the summer for CIDR-treated cows in subgroups that had responded positively to the progesterone treatment.

Original languageAmerican English
Pages (from-to)943-946
Number of pages4
JournalReproduction in Domestic Animals
Volume57
Issue number8
DOIs
StatePublished - Aug 2022

Bibliographical note

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

  • cows
  • fertility
  • progesterone
  • summer

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