Abstract
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 language | English (US) |
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Pages (from-to) | 824-827 |
Number of pages | 4 |
Journal | Journal of dairy science |
Volume | 65 |
Issue number | 5 |
DOIs | |
State | Published - 1982 |
All Science Journal Classification (ASJC) codes
- Food Science
- Animal Science and Zoology
- Genetics