Subgroup analysis for assay type was statistically significant for spontaneous POI only .
Sensitivity analyses of high- quality studies did not change the results , and result ed in a substantial decrease in heterogeneity in spontaneous POI studies .
The current meta- analysis demonstrates that total testosterone concentrations are decreased in women with spontaneous POI or iatrogenic menopause .
BACKGROUND Increasing age and post-menopausal status are associated with decreasing and rogen concentrations in females .
Women with premature loss of ovarian function , such as primary ovarian insufficiency ( POI ) or iatrogenic menopause may be at increased risk for diminished testosterone levels at a relatively young age .
Differentiation between a hypo and rogenic or normo and rogenic state in women with premature loss of ovarian function is problematic due to trueness and precision problems using various testosterone assays .
The current meta- analysis was conducted to evaluate current literature reporting serum total testosterone concentrations under these conditions , including stratification for various testosterone assays .
A longitudinal study of the perimenopausal transition: altered profiles of steroid and pituitary hormones, SHBG and bone mineral density.
From a longitudinal prospect i ve study , 160 women with spontaneous menopause and without steroid medication were followed during the transition from pre- to  postmenopause  . After 12 years 152 women were still participating in the study . Blood sample s were drawn every 6 months until 1 year after the menopause and every 12 months thereafter . Measurements of bone mineral density ( BMD ) on the forearm were performed every second year . All women routinely completed a question naire concerning symptoms frequently attributed to the climacteric period . All data were grouped around the onset of the menopause , thereby allowing longitudinal evaluation of the changes in the variables from the premenopausal to the postmenopausal period . The beginning of the perimenopausal period was characterized by transitory elevations of follicle-stimulating hormone ( FSH ) . A significant increase in serum levels of gonadotropins was observed for both FSH and luteinizing hormone ( LH ) from about 5 years before the menopause . Within the 6 month period around the menopause there was a further increase which culminated within the first postmenopausal year for LH and 2 - 3 years postmenopause for FSH . Thereafter , a continuous decrease in LH occurred over the following 8 years . With respect to FSH , there was a slight decline starting about 4 years postmenopause . During the premenopausal period an increasing frequency of inadequate luteal function or anovulation occurred and , in the postmenopausal years , the serum levels of progesterone ( P ) were invariably low . Gradually , the ratio between estrone ( E1 ) and 17-beta-estradiol ( E2 ) increased , reflecting the declining follicular steroidogenesis . A marked decrease in estrogen levels occurred during the 6 month period around the menopause , most pronounced in E2 . During the next 3 years , the levels of E2 and E1 showed an essentially parallel , moderate decline . Around the menopause , serum levels of testosterone ( T ) , delta 4- and rostenedione ( A ) and sex hormone-binding globulin ( SHBG ) showed small but significant decreases . From about 3 years postmenopause , the levels were relatively constant over the following 5 years . A decrease in BMD was observed in the postmenopause , and from about 3 years postmenopause , estradiol correlated positively with BMD . Before , as well as after the menopause , body mass index ( BMI ) showed an inverse correlation with SHBG . Postmenopausal and rostenedione correlated positively with E1 , E2 and T. BMI correlated positively with E1 and E2 . The concentrations of the free fraction of E2 and T are dependent on the levels of SHBG , which in turn has a negative correlation with BMI . The impact of this will influence the severity of symptoms , the degree of bone loss and the need for supplementary therapy
Subgroup analysis for assay type was statistically significant for spontaneous POI only .
Sensitivity analyses of high- quality studies did not change the results , and result ed in a substantial decrease in heterogeneity in spontaneous POI studies .
The current meta- analysis demonstrates that total testosterone concentrations are decreased in women with spontaneous POI or iatrogenic menopause .
BACKGROUND Increasing age and post-menopausal status are associated with decreasing and rogen concentrations in females .
Women with premature loss of ovarian function , such as primary ovarian insufficiency ( POI ) or iatrogenic menopause may be at increased risk for diminished testosterone levels at a relatively young age .
Differentiation between a hypo and rogenic or normo and rogenic state in women with premature loss of ovarian function is problematic due to trueness and precision problems using various testosterone assays .
The current meta- analysis was conducted to evaluate current literature reporting serum total testosterone concentrations under these conditions , including stratification for various testosterone assays .