What is Premenstrual Syndrome (PMS)?

Premenstrual Syndrome (PMS) is a hormonal disorder, characterized by a regularly recurring group of non-specific symptoms which occur from two to 14 days before a woman’s menstrual period begins, followed by a symptom-free time in each monthly cycle.

It’s estimated that 40% of all women between the ages of 14 and 50 experience PMS, with the most intense symptoms occurring during a woman’s mid to late 30′s. At least 10% of these women experience PMS symptoms severe enough to seriously disrupt both their personal and professional lives. Premenstrual dysphoric disorder (PMDD) is a severe form of premenstrual syndrome.  Read More

Diagnosis & TreatmentFind Support

A Research-Driven PMS Diet

“I always knew diet was important,” says Katharina Dalton, M.D. “What I know now that I didn’t realize in the early years, is just how important diet is in controlling premenstrual syndrome.”

Dr. Dalton’s name is synonymous with premenstrual syndrome (PMS), a phrase she coined in England in the 1950s. As a physician and women’s health pioneer, she first identified this disruptive cyclic phenomenon. Her classic book, Once A Month, set the standard for the many books and PMS studies by medical experts around the globe.

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Menstrual Cycle Diary

Track your PMS symptoms with CEMCOR’s Menstrual Cycle Diary, available for download.  Learn More

Deep Breathing and Meditation

World-renowned pioneer in the field of integrative medicine, Dr. Andrew Weill offers these deep breathing exercises to relieve stress and promote wellbeing.  Learn More

Self-Help for Premenstrual Syndrome

The first book on PMS ever published in the US, Self Help for Premenstrual Syndrome is the definitive resource, offering practical advice, a friendly approach and comprehensive answers to common questions. Revised ed.   Learn More

Featured Video: Keeping the Menstrual Cycle Diary

The Centre for Menstrual Cycle and Ovulation Research’s (CEMCOR) video series on the importance of your menstrual cycle to your overall health. Includes instruction on how to track your cycle.

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Depression , Irritability, and Anxiety in Women with Premenstrual Dysphoric Disorder (PMDD)

This first-ever Surgeon General’s Report on bone health and pms illustrates the large burden that bone disease places on our Nation and its citizens.  Read More

Getting Rid of Water Retention

Water retention before your period can be uncomfortable and annoying — but lifestyle changes, medications and dietary supplements can help relieve this common premenstrual symptom.  Read More



Menopause is technically defined as a woman’s last menstrual period. Most physicians consider a woman to be post-menopausal when she has not menstruated for 12 months.  Read More


Perimenopause is traditionally defined as the years surrounding your last menstrual period. Signs and symptoms of perimenopause vary in every woman. Some women experience gradual changes over several years, while others may have symptoms that are more intense but that last only a few months.  Read More

Expert Feature

Katharina Dalton, MD On A Research-Driven PMS Diet

  • Katharina Dalton“I always knew diet was important,” says Katharina Dalton, M.D. “What I know now that I didn’t realize in the early years, is just how important diet is in controlling premenstrual syndrome.”


Just Released

PMDD Sufferers Are Hyper-Responsive To Sex Hormones

  • Improved understanding of the role of female sex hormones on the drivers and symptoms of premenstrual dysphoric disorder (PMDD) may shed light on the complex interactions between sex hormones and mood, potentially helping to explain the increased prevalence of mood disorders in women.

Thought Leaders Are Talking

  • Cathy Cram, MS, our WomensHealth Fitness Expert, specializes in maternal fitness.

    Cathy Cram Cathy Cram

Did You Know?

The American College of Obstetricians and Gynecologists estimates that at least 85 percent of menstruating women have at least 1 PMS symptom as part of their monthly cycle.

What Your Doc Is Reading

Plasma Leptin Concentrations Increased In Women With PMS
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Keeping a Menstrual Cycle Diary
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Our Community

Can Boron help prevent PMS?

Boron is an essential trace mineral found in the fruits, vegetables, and nuts we eat… More.

Is Omega-3 in fish oil better than in flax seed oil?

There are three types of omega-3 polyunsaturated fatty acids.. More.

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Testosterone After Menopause

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