Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/105253
Type: Journal article
Title: Effect of additional human chorionic gonadotrophin (hcG) on follicular growth and ovulation in gonadotrophin-treated gilts
Author: Manjarín, R.
Cassar, G.
Friendship, R.
Garcia, J.
Dominguez, J.
Kirkwood, R.
Citation: Canadian Journal of Veterinary Research, 2015; 79(3):210-213
Publisher: Canadian Veterinary Medical Association
Issue Date: 2015
ISSN: 0830-9000
1928-9022
Statement of
Responsibility: 
Rodrigo Manjarín, Glen Cassar, Robert M. Friendship, José C. Garcia, J. Carlos Dominguez, Roy N. Kirkwood
Abstract: The objective of this study was to determine the effect of additional human chorionic gonadotrophin (hCG) on the ovarian response of gilts previously treated with 200 IU hCG combined with 400 IU equine chorionic gonadotrophin (eCG) (eCG/hCG). Seventy-one prepuberal gilts (105 ± 7.5 kg) were assigned to groups: i) eCG/hCG (hCG-0; n = 25); ii) eCG/hCG followed by 100 IU of hCG at 24 h (hCG-100; n = 24); iii) eCG/hCG followed by 200 IU hCG at 24 h (hCG-200; n = 10); and iv) controls (CON; n = 12). Ovulation response was assessed by ovarian dissection or real-time ultrasonography. Additional hCG did not significantly improve numbers of gilts ovulating. Numbers of corpora lutea increased with hCG, and was higher in hCG-200 (P < 0.01). Compared to hCG-0, the frequency of cysts in gilts was higher in hCG-100 (P < 0.05) and further increased in hCG-200 (P < 0.01). The number of cysts per gilt was dose-dependently increased by additional hCG. We conclude that supplemental hCG will increase the number of corpora lutea but will be associated with follicular cyst development in a dose dependent manner.
Keywords: Chorionic Gonadotropin; ovulation
Rights: Copyright and/or publishing rights held by the Canadian Veterinary Medical Association
RMID: 0030031241
Published version: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4445513/
Appears in Collections:Animal and Veterinary Sciences publications

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