Response of the 1-5 day-aged ovine corpus luteum to prostaglandin F2alpha

Animal Reproduction Science
Edgardo RubianesB Carbajal

Abstract

The hypothesis that, in the ewe, prostaglandin (PG) F2alpha administration on day 3 after ovulation is followed by luteolysis and ovulation was tested using 24 animals. The ewes were treated with a dose of a PGF2alpha analogue (delprostenate, 160 microg) on days 1 (n=8), 3 (n=8) or 5 (n=8) after ovulation, was established by transrectal ultrasonography. Daily scanning and blood sampling were performed to determine ovarian changes and progesterone serum concentrations by radioinmunoassay. The treatment induced a sharp decrease of progesterone concentrations followed by oestrus and ovulation in all ewes treated on days 3 and 5 and in one ewe treated on day 1 (8/8, 8/8, 1/8; P<0.05). Seven ewes treated on day 1 did not respond to PGF2alpha treatment and had an inter-ovulatory cycle of normal length (17.4 +/- 0.5 days). However, the profile of progesterone concentrations during the cycle of these ewes was delayed 1 day (P<0.05) compared with a control cycle. The overall interval between PGF2alpha and oestrus for the 17 responding ewes was 42.4 +/- 2.3 h. In 15 of these ewes the ovulatory follicle was originated from the first follicular wave and the ovulation occurred at 60.8 +/- 1.8 h after PGF2alpha treatment. The other two respo...Continue Reading

Citations

Feb 14, 2012·Animal Reproduction Science·J A AbeciaA González-Bulnes
Jan 19, 2005·Reproduction in Domestic Animals = Zuchthygiene·C DeligiannisG S Amiridis
Jan 18, 2008·Reproduction in Domestic Animals = Zuchthygiene·D Fernandez-MoroA Gonzalez-Bulnes
Mar 14, 2007·Animal Reproduction Science·I Contreras-SolisA Gonzalez-Bulnes
Sep 16, 2004·Reproduction in Domestic Animals = Zuchthygiene·A MenchacaE Rubianes
Feb 13, 2018·Tropical Animal Health and Production·Alejandro Alavez RamírezHéctor Magaña Sevilla
Jun 18, 2019·Journal of Veterinary Pharmacology and Therapeutics·Beata Łebkowska-WieruszewskaMario Giorgi
Jan 24, 2020·Reproduction, Fertility, and Development·Antonio Gonzalez-BulnesPaula Martinez-Ros
Oct 4, 2014·Reproduction in Domestic Animals = Zuchthygiene·A Lopez-SebastiánJ Santiago-Moreno
Dec 9, 2009·Reproduction in Domestic Animals = Zuchthygiene·F QuanY Zhang
Nov 6, 2017·Tropical Animal Health and Production·Sheylla Foligno de Carvalho Menezes de AlmeidaFelipe Zandonadi Brandão
Feb 1, 2018·Conservation Physiology·Bruna Furlan PolegatoJosé Maurício Barbanti Duarte
Feb 6, 2021·The Veterinary Clinics of North America. Food Animal Practice·Hayder Mohammed Hassan Habeeb, Michelle Anne Kutzler
Jan 11, 2011·The Veterinary Clinics of North America. Food Animal Practice·José A AbeciaAntonio González-Bulnes

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