is_about sex hormone polycystic ovary syndrome sex hormone-binding globulin glycoprotein measurement sex hormone-binding globulin measurement true uniprot:P04278 SHBG levels Is a quantification of sex hormone binding globulin. In men the test is used in when investigating testosterone deficiency. The SHBG glycoprotein binds to circulating estradiol and testosterone, low levels of SHBG may be implicated in breast cancer etiology. http://labtestsonline.org.uk/understanding/analytes/shbg/tab/test/ Helen Parkinson SHBG level http://www.ncbi.nlm.nih.gov/pubmed/22675492 sex hormone measurement