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
Breeds Board
% bulls to heifers
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="KMacGinley" data-source="post: 665663" data-attributes="member: 3175"><p>My theory is that it depends on the timing of the AI. </p><p></p><p>My repro professor at Purdue said that XY(male) sperm cells swim faster than XX(female) cells. XX cells have more stamina and survive longer in the female tract. </p><p></p><p>To get heifers, I AI immediately when I see the cow in heat. I do not wait the 12 hours. For every 10 we do we get about 7 out of 10 heifers pretty consistently.</p><p></p><p>The 12 hour wait puts the speed demon XY cells on the spot when the egg reaches the fallopian tube. By the time the XX cells show up, the ballgame is over. </p><p></p><p>I think it also works in human reproduction, <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> If going for a boy, the more often you try, the more likely you are to get a boy, at least that is what I told my wife. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> I always feel sorry for those guys that have all daughters. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="KMacGinley, post: 665663, member: 3175"] My theory is that it depends on the timing of the AI. My repro professor at Purdue said that XY(male) sperm cells swim faster than XX(female) cells. XX cells have more stamina and survive longer in the female tract. To get heifers, I AI immediately when I see the cow in heat. I do not wait the 12 hours. For every 10 we do we get about 7 out of 10 heifers pretty consistently. The 12 hour wait puts the speed demon XY cells on the spot when the egg reaches the fallopian tube. By the time the XX cells show up, the ballgame is over. I think it also works in human reproduction, :) If going for a boy, the more often you try, the more likely you are to get a boy, at least that is what I told my wife. :) I always feel sorry for those guys that have all daughters. :) [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cattle Boards
Breeds Board
% bulls to heifers
Top