(The implants, and the volume of testosterone in them, can be seen in birds in the hand.) During the study, no wild bird captured had lost its implants, and T-males captured the following spring (one year after implant- ing) always had empty implants. Testosterone levels from wild un...
Elevated Plasma Testosterone and Gonadotropin Levels in Infertile Males with Hyperthyroidism* Elevated plasma testosterone and gonadotropin levels in infertile males with hyperthyroidism. Fertil Steril 1976; 27: 662-6.Clyde HR , Walsh PC , English RW. Elevated plasma testosterone and gonadotropin levels ...
Serum testosterone (T), androstenedione (A), and estradiol (E2) responses to the administration of human chorionic gonadotropin (hCG) 2,000 IU for 3 consecutive days before and 3 months after varicocelectomy were determined. Results Varicocelectomy did not cause any significant changes in the ba...
In males, the main biologically active estrogen is estradiol. The primary source of this hormone is from the aromatization of testosterone1. Estrogen receptors alpha and beta (ERα and ERβ), together with the membrane associated G-protein-coupled functional ER (GPER), and the enzyme cytochrome...
Studies have shown that when men marry and have children, they often see a decline in their androgen levels—or their levels of male sex hormones. Scientists think this could be due to the fact that androgens, such as testosterone, are commonly associated with aggression and mate competition, ...
The strong predilection for thyrotoxic periodic paralysis (TPP) to occur in males suggests androgen may contribute to its pathogenesis. We therefore sought to determine if serum total and free testosterone (TT and FT) concentrations differed among patients with TPP during episodes of paralysis, patient...
Tests the hypothesis that serum concentrations of estradiol and testosterone predict risk for breast cancer. Estimated incidence of breast cancer per 1000 person-years; Traditional risk factors for breast cancer in case-patients and controls; Possible use of a single bioavailable estradiol and free test...
We speculate that the GH-IGF-I axis may be involved in the pathogenesis of pubertal gynaecomastia. 展开 关键词: Humans Adipose Tissue Estradiol Steroids Testosterone Insulin-Like Growth Factor I Luteinizing Hormone Androgens Prevalence Cohort Studies ...
Elevated corticosterone levels elicit non-calling mating tactics in male toads independently of changes in circulating androgens Competition among males for a limited number of females may result in the expression of condition-dependent alternative mating tactics. In such cases, deci... CJ Leary,AM Ga...
Endogenous testosterone and cortisol jointly influence reactive aggression in women The dual-hormone hypothesis posits that the effect of testosterone on social behavior is moderated by cortisol. The present study tested this hypothesis wi... TF Denson,PH Mehta,D Ho Tan - 《Psychoneuroendocrinology》 ...