Because lower gut microbial diversity has been associated with metabolic disorders, researchers have hypothesized that women with PCOS may also exhibit reduced diversity in gut microbiota, which may be linked to other hormonal imbalances including increased levels of testosterone. A recent study published in JCEM compared the fecal microbial diversity profile in healthy women to women diagnosed with PCOS or polycystic ovarian morphology to ascertain key differences and correlations with PCOS clinical parameters (e.g. androgen excess, hirsutism).