Veterinary Research Communications

, Volume 4, Issue 1, pp 113–118 | Cite as

Successful, repeated non-surgical collection of blastocysts from virgin and repeat breeder heifers

  • T. Linares
  • W. A. King
  • K. Larsson
  • I. Gustavsson
  • A. Bane
Letters

Abstract

A total of 55 non-surgical collections, 7 days after spontaneous heat, was made in 19 heifers. Recovery rate was 57% (17/30) from 10 repeat breeder heifers and 72% (18/25) from 9 virgin heifers, this difference was not significant. Fertilization rate in both groups was 94%. The eggs were always recovered in the first 100 ml of flushing medium. Mean lengths of oestrous cycle after non-surgical collection were, respectively, 16.9 and 18.1 days in repeat breeder and virgin heifers. This difference was not significant. However, the cycle in which the first collection was made was significantly shorter (P<.005) than the cycle immediately before the collections. Only 61% of possible eggs were non-surgically collected from 4 superovulated repeat breeder cows and no further eggs were found after slaughter, one to two hours later.

Keywords

Public Health Recovery Rate Veterinary Medicine Fertilization Rate Oestrous Cycle 

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Copyright information

© Elsevier Scientific Publishing Company 1980

Authors and Affiliations

  • T. Linares
    • 1
  • W. A. King
    • 2
  • K. Larsson
    • 1
  • I. Gustavsson
    • 2
  • A. Bane
    • 1
  1. 1.Department of Obstetrics and GynecologySwedish University of Agricultural SciencesUppsala(Sweden)
  2. 2.Department of Animal Breeding and GeneticsSwedish University of Agricultural SciencesUppsala(Sweden)

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