The within-subject and between-subject biological variation of the serum concentrations of follitropin, lutropin, sex-hormone-binding globulin, and testosterone; the ratio between the serum concentrations of testosterone and sex-hormone-binding globulin; and the concentration of testosterone in saliva have been studied in a group of 20 men during 12 months. The between-subject coefficients of v...

The present study aimed to evaluate the effects of Ramadan fasting on the level of sex hormones in girls between 9-13 years before age at menarche.This study was conducted on a sample of 58 subjects (age range: 9-13 years), who were divided intotwo groups of fasting (N=31) and non-fasting (N=27). The levels of follicle-stimulating hormone(FSH), luteinizing hormone (LH), progesterone and estradi...

We examined a 32-year-old man with a 4-year history of infertility. The man's sex life, male hair pattern, and penis were normal, and he had no history of erection problems. Left and right testicular volumes were 2 ml and 3 ml, respectively. Semen analysis showed no sperm. The endocrine panel revealed increased serum luteinizing hormone and follicle-stimulating hormone levels, and a normal seru...

The investing and supporting structures of the teeth, termed Periodontium is responsive to endogenous hormones of our body. Among the endogenous hormone Estrogen and Progesterone have direct influence on oral tissues. The periodontal status at a given time is a cumulative effect of sex hormone levels, their regulatory impact, and the effects of interventions. The two hormones act synergisticall...

BACKGROUND Female sex hormones may play a crucial role in the occurrence of cycle-related mood disorders. However, the literature is inconsistent and methodologically stringent observational studies on the relationship between sex hormones and negative affect are lacking. METHODS In this longitudinal multisite study from Hannover, Germany, and Zurich, Switzerland, we examined oestrogen, proge...

The metabolism of plasticizing phthalates may correlate with an increased risk benign prostatic hyperplasia in humans. Diethylphthalate (DEHP) and its metabolites interfere sex hormone function, causing inflammation oxidative stress at low doses. effects contribute to the development prostate hyperplasia.

The reproductive system is controlled by gonadotropin releasing hormone (GnRH) secretion from the brain, which is finely modulated by a number of factors including gonadal sex steroids. GnRH cells do not express estrogen receptor α, but feedback is transmitted by neurons that are at least 'one step back' from the GnRH cells. Modulation by season, stress and nutrition are effected by neuronal pa...

In an effort to determine if sex differences exist in the morphologic characteristics of pyramidal cells and granule cells of the hippocampal formation and whether sex plays a role in determining thyroid hormone sensitivity of these neuronal populations, we used single-section Golgi impregnation to examine the effects of neonatal thyroid hormone administration on hippocampal cells from the brai...