A new research study in @bmj_latest doi.org/10.1136/bmj.m3… finds the risk to die early (<70yrs) increases with irregularity & length of women’s #menstrualcycle irregularity, with premature mortality mostly due to #cardiovasculardisease. What's it mean for women with #PCOS? 1/13 PCOS affects 10% of women worldwide & irregular menstrual cycles are a common symptom. Many of the women in this study likely have PCOS. Understandably, the higher rates of premature mortality reported will be worrying to women with PCOS. But what causes period irregularity? 2/13