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Administration of constant low doses of androgens to steers by silastic implant. Suppression of gonadotropins and peripheral conversion of androgens
androgen implants steers gonadotropins peripheral metabolism of androgens
2009/2/20
Yearling Hereford calves approximately 300 kg in weight were castrated and assigned to one of six treatment groups receiving subcutaneous implants (3 implants, 0.5 cm diameter by 10 cm length, 10% s...
Pulsatile secretion of gonadotropins and prolactin in male marathon runners. Relation to the endogenous opiate system
gonadotropin prolactin endurancetraining marathon runners pulsatile secretion opiates
2009/2/20
We tested the hypothesis that sustained, strenuous physical training alters the neuroendocrine regulation of pulsatile gonadotropin and/or prolactin secretion in men. Blood was sampled at 20-minute ...
The binding patterns of antisera to sex steroids and human gonadotropins on human and rhesus monkey spermatozoa
human spermatozoa monkey spermatozoa hormone binding sites immunofluorescence steroids
2009/2/20
The presence of different hormones on the surface of ejaculated spermatozoa was determined by immunofluorescence studies of the binding patterns of specific antisera to these hormones. There were st...
Effects of Dibromochloropropane Upon Diurnal Variations of Gonadotropins and Androgens
dibromochloropropane testis histology gonadotropins androgens diurnal variations
2009/2/18
The effects of exposure to dibromochloropropane (DBCP) for one to seven years on testicular physiology were evaluated in five men by measuring the circulating levels of FSH, LH, androstenedione, t...
Effects of castration and recombinant human inhibin administration on circulating levels of inhibin and gonadotropins in adult male monkeys
castration recombinant human inhibin administration circulating levels inhibin gonadotropins adult male monkeys
2009/2/12
Inhibin has been suggested to play a role in gonadal feedback regulation of follicle-stimulating hormone (FSH) secretion; however, neither the half-life nor the time course of action of recombinan...
Heterogeneity of gonadotropins and levels of uncombined luteinizing hormone subunits in pituitaries of cryptorchid rams
uncombined luteinizing hormone subunits pituitaries cryptorchid rams
2009/2/12
Pituitaries were collected from intact rams and rams that had been rendered bilaterally cryptorchid by surgery to examine the effects of cryptorchidism on gonadotropin heterogeneity, levels of uncom...
Comparative effects of two different delivery systems on gonadotropin-releasing hormone（GnRH） antagonist-induced suppression of gonadotropins and testosterone in man
GnRH antagonists luteinizing hormone (LH)
2009/2/12
The Nal-Glu gonadotropin-releasing hormone (GnRH) antagonist, when given in daily subcutaneous (SC) doses of 5 mg or higher, maximally suppresses serum luteinizing hormone (LH) and follicle-stimul...
Dose-response effects of gonadotropin-releasing hormone on plasma concentrations of gonadotropins and testosterone in fertile and subfertile stallions
gonadotropin-releasing hormone luteinizing hormone follicle-stimulating hormone testosterone horse fertility
2009/2/11
Five fertile and five subfertile stallions were treated with a single intravenous injection of saline the first week followed by a single intravenous injection of varying doses of gonadotropin-rel...
Feedback Inhibition of Gonadotropins by Testosterone in Men With Hypogonadotropic Hypogonadism: Comparison to the Intact Pituitary-Testicular Axis in Primary Hypogonadism
Gonadotropins Men Hypogonadotropic Hypogonadism Intact Pituitary-Testicular Axis Primary Hypogonadism
2008/12/24
Men with hypogonadotropic hypogonadism (HH) due to hypothalamic-pituitary disease present with low serum testosterone levels combined with undetectable, low, or normal gonadotropin levels. Treatment...