title: Seasonal fluctuations in plasma progesterone concentrations in Gentile-di-Puglia and Ile-de-France ewes in southern Italy.
abstract: Ile-de-France ewes had high plasma progesterone concentrations during early summer-late winter. Gentile-di-Puglia ewes had high progesterone values during the winter-spring-summer period but during autumn progesterone values were very low and oestrous behaviour was not displayed. The comparison with Ile-de-France ewes indicates that a phase shift occurs in the annual ovarian activity in ewes of the Gentile-di-Puglia breed.
authors.affiliation: Istituto Sperimentale per la Zootecnia, Foggia, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Dell'Aquila
authors.forename: B
authors.initials: B
authors.lastname: Varriale
authors.forename: G
authors.initials: G
authors.lastname: Alberico
authors.forename: R
authors.initials: R
authors.lastname: Pierantoni
mesh_terms: D000818:Animals; D005260:Female; D008027:Light; D010053:Ovary / Q000502:physiology; D011374:Progesterone / Q000097:blood*; D012621:Seasons; D012756:Sheep / Q000097:blood*
chemical_list: D011374:Progesterone