Robyn Stein DeLuca: The good news about PMS

Everybody knows that most women go a little crazy right before they get their period, that their reproductive hormones cause their emotions to fluctuate wildly. Except: There’s very little scientific consensus about premenstrual syndrome. Says psychologist Robyn Stein DeLuca, science doesn’t agree on the definition, cause, treatment or even existence of PMS. She explores what we know and don’t know about it — and why the popular myth has persisted. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world’s leading thinkers and doers give the talk of their lives in 18 minutes (or less). Look for talks on Technology, Entertainment and Design -- plus science, business, global issues, the arts and much more. Find closed captions and translated subtitles in many languages at Follow TED news on Twitter: Like TED on Facebook: Subscribe to our channel: