ABSTRACT
Radioimmunoassay measurements of plasma hormones : gonadotropins (Gn), Luteinizing hormone (LH) and follicle stimulating hormone (FSH), prolactin (PRL), cortisol and sex hormones i.e. estradiol (E2) and progesterone (P4) in women and testosterone (T) in men were simultaneously performed to establish normal range data of hormone secretions in Thai subjects. Values of hormonal profiles in the females during the normal menstrual cycles or in 118 healthy males of reproductive age were similar to data described for Thai and other nationalities by previous investigators. Data obtained in the present study may be useful as a guide for interpretation of normal and abnormal hormone secretions in Thai subjects, although minor inter-laboratory discrepancies in results may exist.