Linked Life Data

10734422

Source:http://linkedlifedata.com/resource/pubmed/id/10734422

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pubmed-article:10734422pubmed:abstractTextTwenty-two goats were superovulated with PMSG; 84 h after the onset of estrus the goats were treated with saline solution (control group n = 7), hCG (hCG group, n = 7), or GnRH (GnRH group, n = 8). The ovaries of all the goats were laparoscopically examined 3 and 6 d after the onset of estrus. In each case the CL were counted and classified according to their appearance as normal-looking or as regressing. Blood samples for progesterone determination were collected every 12 h from Day 1 to Day 6. Premature luteal regression was considered to have occurred if progesterone concentrations declined to less than 1 ng/mL by Day 6. According to progesterone concentrations, 57.5, 0 and 37.5% of the goats underwent premature luteal regression in the control, hCG and GnRH groups, respectively. Progesterone concentrations were higher in the hCG group than in the other groups on Days 5 and 6 post estrus (P < 0.05). The control group was the only one in which there was a significant (P < 0.05) increase in the number of regressing CL between Day 3 (1.6 +/- 1.4) and Day 6 (7.3 +/- 1.4). It was also the only group in which there was a significant decrease in the number of normal-looking CL between Day 3 (12.6 +/- 2.1) and Day 6 (2.6 +/- 2.1). On Day 6 the animals treated with hCG had significantly more normal-looking CL (12.0 +/- 2.3) than those in the control group (2.6 +/- 2.1). The number of large follicles present on the ovaries on Day 6 post estrus had negative correlations with progesterone concentrations (P = 0.05) and with the number of normal-looking CL (P < 0.05). It is concluded that the administration of hCG 84 h after the onset of estrus prevents premature luteal regression in goats superovulated with PMSG.lld:pubmed
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pubmed-article:10734422pubmed:pagination1039-52lld:pubmed
pubmed-article:10734422pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:10734422pubmed:year1998lld:pubmed
pubmed-article:10734422pubmed:articleTitlePremature luteal regression in goats superovulated with PMSG: effect of hCG or GnRH administration during the early luteal phase.lld:pubmed
pubmed-article:10734422pubmed:affiliationDepartamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, México D.F., México.lld:pubmed
pubmed-article:10734422pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10734422pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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