PMID: 11325206Apr 28, 2001Paper

Efficacy of an intravaginal progesterone insert and an injection of PGF2alpha for synchronizing estrus and shortening the interval to pregnancy in postpartum beef cows, peripubertal beef heifers, and dairy heifers

Journal of Animal Science
M C LucyH D Hafs

Abstract

The objective was to test the efficacy of an intravaginal progesterone insert and injection of PGF2alpha for synchronizing estrus and shortening the interval to pregnancy in cattle. Cattle were assigned to one of three treatments before a 31-d breeding period that employed artificial insemination. Control cattle were not treated, and treated cattle were administered PGF2alpha or an intravaginal progesterone-releasing insert (CIDR) for 7 d and treated with PGF2alpha on d 6. The treatments were applied in one of three experiments that involved postpartum beef cows (Exp. 1; n = 851; 56+/-0.6 d postpartum), beef heifers (Exp. 2; n = 724; 442.5+/-2.8 d of age), and dairy heifers (Exp. 3; n = 260; 443.2+/-4.5 d of age). Luteal activity before treatment was determined for individual cattle based on blood progesterone concentrations. In Exp. 1, there was a greater incidence of estrus during the first 3 d of the breeding period in CIDR+PGF2alpha-treated cows compared with PGF2alpha-treated or control cows (15, 33, and 59% for control, PGF2alpha, and CIDR+PGF2alpha, respectively; P < 0.001). The improved estrous response led to an increase in pregnancy rate during the 3-d period (7, 22, and 36% for control, PGF2alpha, and CIDR+PGF2alpha,...Continue Reading

Citations

Oct 8, 2009·Tropical Animal Health and Production·N YimerP Ganesamurthi
Oct 7, 2011·Biology of Reproduction·Daniel H Poole, Joy L Pate
Jul 24, 2012·Journal of Dairy Science·C Fischer-TenhagenW Heuwieser
Jan 7, 2017·Reproductive Biology and Endocrinology : RB&E·Anja BaufeldJens Vanselow
Oct 6, 2020·Journal of Animal Science and Biotechnology·Sarah E Moorey, Fernando H Biase
Mar 30, 2005·Proceedings of the National Academy of Sciences of the United States of America·George A PerryThomas W Geary
Jul 3, 2003·Journal of Dairy Science·F M RhodesK L Macmillan
Jan 9, 2004·Journal of the American Veterinary Medical Association·Robert L LarsonDouglas E Hostetler
May 8, 2014·Journal of Animal Science·G A BridgesG A Perry
Nov 20, 2016·Reproduction in Domestic Animals = Zuchthygiene·R K KasimanickamW D Whittier
Sep 27, 2018·Translational Animal Science·Maggie K ReynoldsJohn B Hall
Jul 1, 2010·Reproduction in Domestic Animals = Zuchthygiene·M YusufT Furuya
Nov 27, 2016·Tropical Animal Health and Production·J K SahooS P Sahoo
Apr 2, 2014·Reproduction : the Official Journal of the Society for the Study of Fertility·Heather TalbottJohn S Davis
Jun 12, 2020·The Journal of Reproduction and Development·Natsumi EndoTomomi Tanaka

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