Effect of Thawing Time on Fertility of Bovine Spermatozoa in French Straws

J. O. Almquist, K. E. Grube, J. L. Rosenberger

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Thawing times of 9 and 40 s were compared in a 6-mo fertility experiment involving 18,057 first service inseminations to 23 Holstein bulls. Semen extended in Tris-yolk and packaged in . 5-ml French straws was thawed in warm water baths (32 to 35°C) for either 9 or 40 s on alternate days. Based on 75-day nonreturn rates in log-linear models, fertility was significantly higher when semen was thawed for 40 s (66.3%) than for 9 s (64.4%). The improvement with longer thawing was not affected significantly by montli (January through June). Thus, warming of semen in straws to a temperature approaching body temperature provided a slight increase in fertility even during cold weather.

Original languageEnglish (US)
Pages (from-to)824-827
Number of pages4
JournalJournal of dairy science
Issue number5
StatePublished - 1982

All Science Journal Classification (ASJC) codes

  • Food Science
  • Animal Science and Zoology
  • Genetics


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