What are the signs of low testosterone in women?
The symptoms usually pinned on low testosterone in women (low sexual desire, fatigue, low mood, brain fog, changes in body composition) are real, but here's the honest science: an international expert consensus found no blood level of any androgen that reliably separates women with these symptoms from women without, and no validated symptom questionnaire that diagnoses "female testosterone deficiency" [1]. Testosterone is a normal and important hormone in women (made in the ovaries and adrenal glands, declining gradually with age), but neither a symptom nor a blood number can confirm a deficiency on its own. So this tool deliberately gives you no score and no diagnosis, only a map of the areas worth raising with a clinician.
Does testosterone therapy work for women?
Across the trials, the one evidence-based use of testosterone therapy in women is for hypoactive sexual desire disorder (HSDD) after menopause, distressing low sexual desire that isn't explained by something else, where testosterone has been shown to modestly improve sexual function [1][2]. That's a diagnosis a clinician makes, not a number a test returns. For other symptoms often attributed to "low testosterone" (fatigue, mood, cognition, body composition), the evidence does not support testosterone as a treatment, and these symptoms usually have other, more likely explanations in midlife: perimenopause, thyroid changes, sleep, stress, or mood.
What should you do with your result?
If this tool flagged some areas, that's useful information to bring to an appointment, not a reason to assume you need testosterone. A clinician can look at the whole picture, consider the far more common causes first, and (if HSDD after menopause fits) discuss whether a carefully monitored trial of testosterone is reasonable for you.
References
[1] Davis SR, Baber R, Panay N, et al. Global Consensus Position Statement on the Use of Testosterone Therapy for Women. Climacteric. 2019;22(5):429-434. doi:10.1080/13697137.2019.1637079 https://pubmed.ncbi.nlm.nih.gov/31474158/
[2] Islam RM, Bell RJ, Green S, Page MJ, Davis SR. Safety and efficacy of testosterone for women: a systematic review and meta-analysis of randomised controlled trial data. Lancet Diabetes Endocrinol. 2019;7(10):754-766. doi:10.1016/s2213-8587(19)30189-5 https://pubmed.ncbi.nlm.nih.gov/31353194/