Ovarian and Pituitary Responses of Seasonally and Postpartum Anestrous Ewes to Gonadotropin Releasing Hormone

In the first experiment, seasonally anestrous ewes were treated with saline or gonadotropin releasing hormone (GnRH) either intramuscularly in saline, subcutaneously in carboxymethylcellulose or subcutaneously in a gelatin capsule. Ewes were bled for progesterone determination prior to treatment and up to 13 days after treatment. Ewes were classified into one of four progesterone categories: cyclic, transient increase, prolonged increase, or no response. More ewes were classified as having a prolonged increase in progesterone in the GnRH in gelatin capsule-treated ewes (40%) than in the saline-treated controls (0%). GnRH in gelatin capsule-treated ewes, classified as having a prolonged increase in progesterone, had greater (P (LESSTHEQ) .05) progesterone concentrations than other GnRH-treated ewes that were classified in the prolonged increase in progesterone category.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Animal Sciences

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Vincent, Douglas Lee

• Agriculture, Animal Culture and Nutrition

Identifier

(UMI)AAI8324666

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/70010