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</html><thumbnail_url>https://blogs.bmj.com/bjsm/files/2019/02/iStock-854458446.jpg</thumbnail_url><thumbnail_width>724</thumbnail_width><thumbnail_height>483</thumbnail_height><description>By Dr Nicky Keay&#xA0;@nickyKfitness Menstrual periods are a barometer of healthy hormones. The evolutionary purpose of ovulation is to reproduce. Furthermore the carefully biologically choreographed variation of hormones that occurs during an ovulatory menstrual cycle is crucial to health and athletic performance. Why?&#xA0;Hormones are chemical messengers that have far reaching effects throughout the body and [...]Read More...</description></oembed>
