GnRH Agonist Stimulate Oocyte Number And Maturation In Mice Superovulated With eCG AND hCG
Ömer Coşkun 1 * , Mehmet Kanter 1
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1 Zonguldak Karaelmas University, Faculty of Medicine, Department of Histology and Embryology, Zonguldak, Turkey* Corresponding Author

Abstract

Aim: This study was designed to investigate the effects of gonadotropin-releasing hormone agonist (GnRHa) on the ovulation rate, the oocyte number and maturation in mice superovulated with equine chorionic gonadotropin (eCG) and human chorionic gonadotropin (hCG). Methods: Thirty female mice, aging 3 months and weighing between 25-30 g, were assigned to the three experimental groups of control, superovulated and GnRHa treated, each containing 10 animals. Control mice were received only the intraperitoneal (i.p.) injection of 0.1 ml 0.9% NaCl. Superovulated mice were given an i.p. injection of 5 IU of eCG followed 48 hr later by 5 IU of hCG injection (i.p.). The GnRHa treated mice were received an intramuscular (i.m.) injection of a 20 mg/kg GnRHa (buserelin) 24 hr before the superovulation with eCG -hCG. Thirteen hr after hCG administration, mice were sacrificed by cervical dislocation. The ovaries and the fallopian tubes were also harvested for counting the corpora lutea and cumulus-enclosed oocytes. Results: The oocyte number and the maturation, ovulation rate, and the corpus luteum number were higher in GnRHa treated mice than controls and superovulated mice. Conclusion: It is concluded that an i.m. injection of the GnRHa 24 hr before the superovulation with eCG-hCG increases the oocyte number and maturation, and ovulation rate, thus, could be used for in vivo and in vitro fertilizations.

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Article Type: Original Article

EUR J GEN MED, Volume 2, Issue 1, January 2005, 1-4

https://doi.org/10.29333/ejgm/82255

Publication date: 15 Jan 2005

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