Menu
Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Forums
Cattle Boards
Health & Nutrition
Hot Weather in Late Pregnancy...
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support CattleToday:
Message
<blockquote data-quote="certherfbeef" data-source="post: 114512" data-attributes="member: 190"><p>by Glenn Selk, OSU Extension Today 8/13/2005 8:04:00 AM</p><p></p><p>Cattle Health: Hot Weather in Late Pregnancy Affects Gestation Length</p><p></p><p> </p><p></p><p>Oklahoma State University physiologists studied early fall (August) and late fall (October) calving cows. Data from two successive years were combined for 50 Angus X Hereford crossbred cows. The "early" and "late" fall calving cows had been artificially inseminated in early November or early January, respectively. Semen from the same sire was used for all cows. All cows were exposed to a single cleanup bull for 35 days at 4 days after the AI season. The weather prior to calving was significantly different for late pregnancy in the two groups. The average maximum temperature the week before calving was 93 degrees F. for the "early" fall group. The average maximum temperature the week before parturition in the "late" calving group was 66 degrees F. There was a 100% survival rate for calves in both groups and both groups of cows had very high re-breeding rates (93% and 96%, respectively). The average gestation length for the "early" cows was 3 days shorter (280 days) as compared to the "late" cows (283 days). Producers with early fall-calving cows should expect calves to start coming several days ahead of the "textbook gestation table" dates. They should begin their routine heifer and cow checks at least a week ahead of the expected first calving date. Source: Kastner, Wettemann, and co-workers. 2004 Southern Section of American Society of Anim. Sci. Abstract 77.</p></blockquote><p></p>
[QUOTE="certherfbeef, post: 114512, member: 190"] by Glenn Selk, OSU Extension Today 8/13/2005 8:04:00 AM Cattle Health: Hot Weather in Late Pregnancy Affects Gestation Length Oklahoma State University physiologists studied early fall (August) and late fall (October) calving cows. Data from two successive years were combined for 50 Angus X Hereford crossbred cows. The “early” and “late” fall calving cows had been artificially inseminated in early November or early January, respectively. Semen from the same sire was used for all cows. All cows were exposed to a single cleanup bull for 35 days at 4 days after the AI season. The weather prior to calving was significantly different for late pregnancy in the two groups. The average maximum temperature the week before calving was 93 degrees F. for the “early” fall group. The average maximum temperature the week before parturition in the “late” calving group was 66 degrees F. There was a 100% survival rate for calves in both groups and both groups of cows had very high re-breeding rates (93% and 96%, respectively). The average gestation length for the “early” cows was 3 days shorter (280 days) as compared to the “late” cows (283 days). Producers with early fall-calving cows should expect calves to start coming several days ahead of the “textbook gestation table” dates. They should begin their routine heifer and cow checks at least a week ahead of the expected first calving date. Source: Kastner, Wettemann, and co-workers. 2004 Southern Section of American Society of Anim. Sci. Abstract 77. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cattle Boards
Health & Nutrition
Hot Weather in Late Pregnancy...
Top