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<blockquote data-quote="Ozhorse" data-source="post: 1063714" data-attributes="member: 18575"><p>I have Angus cattle and have not been farming all that long so I am sort of a newbie. I have a few questions of those who know better:</p><p></p><p>1) Do Angus tend to calve earlier than other breeds? </p><p>I get the feeling with the 100 herd cows they calve at least a week before the gestation table I use tell me they should. I single sire join and then swap the bulls around and try to keep track of who Dad is by having a rough idea of what calves are born when. The early calving throws my calculations out.</p><p></p><p>2) Does the CALF have some control of the gestation length? </p><p>I have 10 registered cows that AI'd for the first time last year. These girls usually have big solid calves. The bull I AI'd to has very short gestation length figures as well as low Birth weight figures. Just checked the cows, their figures are like mostly -0.9 to -3 days. The bulls gestation length figure is -6 days. They were AI'd on the 29th Oct 2012 and the calves were born between 1Aug 2013 and 6 Aug 2013. They were small calves for these cows too but they also had reduced feed last 3 months.</p><p></p><p>Does that mean the genetics of the calf to some extent can control the gestation of the mother - or another way, does a calf have some control over its own gestation length via hormones or whatever?</p></blockquote><p></p>
[QUOTE="Ozhorse, post: 1063714, member: 18575"] I have Angus cattle and have not been farming all that long so I am sort of a newbie. I have a few questions of those who know better: 1) Do Angus tend to calve earlier than other breeds? I get the feeling with the 100 herd cows they calve at least a week before the gestation table I use tell me they should. I single sire join and then swap the bulls around and try to keep track of who Dad is by having a rough idea of what calves are born when. The early calving throws my calculations out. 2) Does the CALF have some control of the gestation length? I have 10 registered cows that AI'd for the first time last year. These girls usually have big solid calves. The bull I AI'd to has very short gestation length figures as well as low Birth weight figures. Just checked the cows, their figures are like mostly -0.9 to -3 days. The bulls gestation length figure is -6 days. They were AI'd on the 29th Oct 2012 and the calves were born between 1Aug 2013 and 6 Aug 2013. They were small calves for these cows too but they also had reduced feed last 3 months. Does that mean the genetics of the calf to some extent can control the gestation of the mother - or another way, does a calf have some control over its own gestation length via hormones or whatever? [/QUOTE]
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