Use of milk progesterone and PGF[subscript]2alpha in a scheduled insemination program

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dc.contributor.author Stevenson, Jeffrey S.
dc.contributor.author Pursley, J. R.
dc.date.accessioned 2011-08-02T21:29:27Z
dc.date.available 2011-08-02T21:29:27Z
dc.date.issued 2011-08-02
dc.identifier.uri http://hdl.handle.net/2097/11958
dc.description.abstract Holstein cows milked twice daily were assigned to be inseminated at their first detected estrus (control) after 42 days in milk or received PGFza (PG) after 42 days, if they had a high milk progesterone (P4) test on any of 3 consecutive Mondays until first inseminated. Milk P4 tests and injections of PG were given on Mondays, and most of the breeding occurred on Thursdays and Fridays. The proportion of cows inseminated within 21 days of the beginning of the breeding period was greater in the milk P4 + PG group (52.8%) than in the control (38.9%). Compared to controls, use of PG reduced days to first service by 12.2 ± 3.1 d, calving intervals by 23.3 ± 8.9 d, rate of reproductive culling, and cost per pregnancy. We concluded that using PG as a management tool in an AI program is warranted and cost effective. However, the milk P4 test would not be justifiable unless its cost were significantly lower than the cost of a weekly injection of PG. en_US
dc.publisher Kansas Agricultural Experiment Station en_US
dc.relation.isPartOf Dairy Day, 1993 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 94-149-S en_US
dc.relation.isPartOf Report of progress (Kansas Agricultural Experiment Station); 694 en_US
dc.subject PGF[subscript]2alpha en_US
dc.subject Progesterone en_US
dc.subject A.I. en_US
dc.title Use of milk progesterone and PGF[subscript]2alpha in a scheduled insemination program en_US
dc.type Conference paper en_US
dc.date.published 1993 en_US
dc.citation.epage 54 en_US
dc.citation.spage 51 en_US
dc.contributor.authoreid jss en_US

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