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Is PMS Real or Is It Just a Myth?

You know that week before your period when even a sappy commercial can have you reaching for the tissues? Or when you feel irrationally angry at your boyfriend even though all he did was forget to pick up milk on the way home? Turns out, you may have nothing to blame those mood swings on but yourself.

Is PMS Real or Is It Just a Myth?

According to a new meta-analysis of PMS studies by researchers from the University of Toronto, there is no clear link between women’s negative moods and the premenstrual phase of their cycles. It’s all a myth.

The researchers, a team lead by psychologist Gillian Einstein, took a look at 47 English language studies found on PubMed, PsycINFO, and various article bibliographies. They conducted a critical analysis of the daily mood data presented in these studies, but could not find any clear evidence that premenstrual syndrome exists.

Specifically, here’s what they found:

  • 18 studies (38.3%) found no association of mood with any negative emotion phase (MC phase)
  • 18 studies (38.3%) found an association of negative mood in the premenstrual phase — but combined with another MC phase
  • 7 studies (14.9%) found an association of negative mood and the premenstrual phase
  • The remaining 4 studies (8.5%) showed an association between negative mood and non-premenstrual phases

It’s pretty revealing that only 14.9% studies could link a negative emotional phase with the premenstrual phase, and that 8.5% could link negative emotions with other non-premenstrual phases.

Likewise, Einstein’s own research on women’s hormonal levels could not establish any kind of association. She concluded that, with a few exceptions, neither absolute hormone levels nor menstrual cycle phases were responsible for altering the moods of women.

Speaking through a release, Einstein had this to say: “Before women even get their first period, they have heard about PMS. The notion is so ingrained in our culture that some of these studies are actually biased because women know the study is about PMS.” And just as bad, she feels that the “PMS myth” is perpetuating negative concepts that link female reproduction with negative emotions.

It’s important to note that the review did not look into the existence of premenstrual dysphoric disorder (PMDD) — a clinical mood disorder associated with the menstrual cycle (one that is characterized by severe physical and behavioural symptoms in the latter half of the menstrual cycle). The study also did not discount the existence of physical symptoms such as bloating and cramping related to the premenstrual phase.

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Image: marietower.com

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