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...

AIM In this study, it was aimed to evaluate the clinical, antropometric and laboratory findings of female patients diagnosed with central precocious puberty and to determine the laboratory value with the best diagnostic accuracy in the diagnosis of central precocious puberty. MATERIALS AND METHOD Female patients whose breast development began before the age of 8 years were included in the stu...

Background: Ovarian physiology illustrates the synergistic interaction between luteinizing hormone and follicle stimulating hormone in the process of folliculogenesis. While follicle stimulating hormone has been well established as a marker of ovarian reserve, the role of luteinizing hormone has remained somewhat controversial and it seems to have become the ‘forgotten gonadotropin’. The follow...

Objective Polycystic ovary syndrome (PCOS) is one of the most common endocrinological disorders among women of reproductive age and the leading cause of female infertility. This study intends to evaluate the lipid profile, hormonal levels [free T3 (fT3), free T4 (fT4), thyroid stimulating hormone (TSH), insulin, luteinizing hormone (LH), follicle stimulating hormone (FSH), and prolactin] in PCO...

Khosrow Adeli Clinical Biochemistry, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, M5G 1X8 Canada List of abbreviations: CALIPER, Canadian Laboratory Initiative on Pediatric Reference Intervals; RIDL, Reference Intervals and Decision Limits; IFCC, International Federation of Clinical Chemistry and Laboratory Medicine; CLSI, Clinical Laboratory Standards Institute; GGT...

Background: Infertility is defined as the inability to conceive after one two years of unprotected intercourse. It types: primary infertility and secondary 5On basis etiopathology divided into five groups: unexplained (28%), male factor (24%), ovarian dysfunction (21%), tubal (14%) others (13%). Luteinizing hormone (LH) follicle-stimulating (FSH) are integral parts neural endocrine interchange ...

Treatment of immature mice with both follicle-stimulating hormone and human chorionic gonadotrophin in vivo resulted in large increases in the specific activities of ovarian alkaline phosphatase and alkaline nucleotidase. The specific activities of other ovarian enzymes studied were not altered by gonadotrophin treatment. A simultaneous change in the Michaelis constant of ovarian alkaline phosp...