title: Concentrations of luteinizing hormone and follicle-stimulating hormone in the serum of sexually intact and neutered dogs.
abstract: Concentrations of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) were measured in serum samples obtained from 100 dogs. Groups (n = 25/group) consisted of sexually intact and ovariohysterectomized bitches and sexually intact and castrated male dogs. Mean (+/- SD) concentrations of LH in the serum of sexually intact and ovariohysterectomized bitches were 1.2 (+/- 0.9) and 28.7 (+/- 25.8) ng/ml, respectively. Mean concentrations of FSH in the serum of sexually intact and ovariohysterectomized bitches were 98 (+/- 49) and 1,219 (+/- 763) ng/ml, respectively. Mean concentrations of LH in the serum of sexually intact and castrated male dogs were 6.0 (+/- 5.2) and 17.1 (+/- 9.9) ng/ml, respectively. Mean concentrations of FSH in the serum of sexually intact and castrated male dogs were 89 (+/- 28) and 858 (+/- 674) ng/ml, respectively. In addition to history, physical examination results, and other laboratory values, the measurement of serum gonadotropin concentrations may aid in determining whether dogs have been neutered.
authors.affiliation: Department of Clinical Sciences, Colorado State University, Fort Collins 80523.
authors.forename: P N
authors.initials: PN
authors.lastname: Olson
authors.forename: J A
authors.initials: JA
authors.lastname: Mulnix
authors.forename: T M
authors.initials: TM
authors.lastname: Nett
mesh_terms: D000818:Animals; D001947:Breeding; D004285:Dogs / Q000097:blood*; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood*; D007044:Hysterectomy / Q000662:veterinary; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D009919:Orchiectomy / Q000662:veterinary*; D010052:Ovariectomy / Q000662:veterinary*; D011374:Progesterone / Q000097:blood; D011863:Radioimmunoassay; D012016:Reference Values
chemical_list: D011374:Progesterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone