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Polycystic ovary syndrome (PCOS): what the research says

53 studies on polycystic ovary syndrome (pcos) in PMS and PMDD, each explained in plain English. 2 of them use the strongest designs: randomised trials and systematic reviews.

Survey study 17Review 9Randomised trial 8Case report 5Cohort study 4Systematic review 4
Cohort study, 2025

Does having PCOS raise the risk of premenstrual disorders like PMS or PMDD?

Yes. Women with PCOS had a higher risk of being diagnosed with a premenstrual disorder than women without PCOS, and this held up even when comparing sisters to each other.

Systematic review, 2010

Does acupuncture treat premenstrual syndrome?

Evidence for acupuncture treating PMS is limited and understudied. Most evidence focuses on period pain and menopause, but all evidence has quality problems.

Cohort study, 2026

Does having worse premenstrual symptoms mean you are more likely to get pregnant?

Women with more severe premenstrual symptoms were more likely to get pregnant during infertility treatment, with pregnancy rates rising from 12.7% to 35.0% across severity groups. However, the reason is unclear because hormone levels were not measured.

Cohort study, 2026

Do early-life exposures like antibiotics or breastfeeding affect PMS risk?

Yes. Long-term antibiotic use, earlier puberty, maternal smoking, and not being breastfed were linked to higher PMS odds. But only 0.07% of the study had PMS, so findings need careful interpretation.

Randomised trial, 2026

Does vitamin D help with PMS symptoms?

This review found that low vitamin D is linked to more severe PMS symptoms, and supplementation significantly reduces PMS scores, especially for mood-related symptoms. However, the studies used different doses and measuring methods, so more rigorous research with standardized dosing is needed.

Systematic review, 2025

Does seed cycling reduce PMS symptoms?

This review of 10 studies with 635 women found that seed cycling, especially flax and sesame seeds, was linked to improved menstrual regularity and reduced PMS symptom severity. However, evidence is based on small studies.

Case-control study, 2025

Do women with polycystic ovary syndrome have more severe premenstrual symptoms and mental health problems?

Women with PCOS had significantly more water retention before their period and higher weight, but the study found no significant differences in mental health scores compared to women without PCOS.

Survey study, 2025

How do body size and shape relate to menstrual problems in women with PCOS?

In women with and without PCOS, menstrual problems are linked to where body fat is stored. For the Hindu women studied, waist size was most important. For Muslim women, waist size, cycle length, and weight all played a role.

Survey study, 2022

What are the biggest research gaps in women's health, especially for menstrual conditions?

Research is lacking in many important areas, especially communication between women and doctors about health, and support for menstrual conditions like PMDD and heavy periods. There is more research on menopause but not on how to help women manage other conditions.

Survey study, 2021

What are the menstrual cycle patterns and how common are PMS and PCOS in young Korean women?

PMS affected 25.5% of participants and PCOS affected 5.2%. Most women with regular periods had normal cycle length (93% had 21-35 day cycles) and normal duration, though 55.9% reported heavy bleeding.

Randomised trial, 2020

Does progesterone therapy help premenstrual syndrome in women with PCOS?

Yes, progesterone significantly reduced multiple emotional PMS symptoms in women with PCOS, including depression, anxiety, and mood swings.

Review, 2018

How does the menstrual cycle affect sleep?

Sleep quality is worse during the premenstrual phase and during menstruation, especially if you have PMS or period pain. The week before your period also involves less REM sleep and changes in body temperature.

Survey study, 2018

Does higher body weight and body fat relate to worse PMS symptoms?

Yes. Higher BMI, body fat percentage, and abdominal fat all correlated with both physical and psychological PMS symptoms. Abdominal fat was the strongest predictor.

Review, 2014

Are mental health problems linked to gynecological conditions like PMS and PMDD?

Yes. Anxiety and depression are common with PMS and PMDD and are frequently undetected and untreated, affecting women's work, social and personal lives.

Randomised trial, 2013

Does progesterone reduce PMS symptoms in women with polycystic ovary syndrome?

Yes. Women with PCOS and PMS who took progesterone had significant reductions in depression, anxiety, mood swings, bloating, and several other PMS symptoms compared to placebo.

Systematic review, 2007

Does light exposure affect menstrual cycles through melatonin?

Yes, there is evidence that light exposure affects menstrual cycles and symptoms through melatonin secretion. Women with bipolar disorder or polycystic ovary syndrome may be especially vulnerable.

Study, 2026

Does evening primrose oil help teenage girls and young women with menstrual cycle problems?

86.79% had improvements. Girls with PMS reported better sleep and memory. Those with PCOS reported better mood and appearance.

Survey study, 2026

What factors affect how severe PMS is in women with PCOS?

Women with PCOS commonly have severe PMS. Smoking, lower education, and not being treated for anemia increase severity, while regular periods decrease it.

Randomised trial, 2026

Can the herb ashwagandha help with PMS symptoms?

It might help with things like fatigue, anxiety and stress, but this is just a review of existing evidence, not a new study, and most of the evidence is from lab or animal research rather than women with PMS.

Interview study, 2025

Can hormones from the menstrual cycle cause sacroiliac joint inflammation?

It is possible but not yet proven. This review suggests that hormone changes during the late menstrual cycle might temporarily cause inflammation in sacroiliac joints, especially in women with PCOS.

Review, 2025

How do hormone changes during the menstrual cycle affect women's health?

Hormone fluctuations can cause irregular periods, mood swings, acne, fatigue, and conditions like PMS and PCOS, made worse by stress and poor lifestyle habits. This is a general review without specific research findings or proven treatments.

Randomised trial, 2025

Can soy isoflavone supplements help with PMS and PMDD symptoms?

This paper describes theoretical mechanisms through which soy isoflavone supplements could help PMS and PMDD by affecting hormones, neurotransmitters, and inflammation. However, it presents only theoretical pathways, not results from actual human trials, so real-world effectiveness remains unknown.

Survey study, 2025

How common is PMS or PMDD in Indian women and how much do they know about it?

Very common. 92% had symptoms and 78% screened positive for PMS or PMDD. But 85% had little or no knowledge about these conditions.

Survey study, 2025

Is PMS common in women with PCOS, and does it affect quality of life?

Yes. PMS is very common in women with PCOS and is linked to lower quality of life, though the link is small, meaning other factors also matter.

Review, 2025

What is the menstrual cycle and how do menstrual disorders affect women?

The menstrual cycle has four phases with complex hormonal and physical changes. Several disorders including PMS and PMDD significantly impact quality of life. New tracking apps and wearable devices can help monitor cycles and health.

Review, 2025

Does nutrition affect PMS and menstrual cycle regularity?

Yes, good nutrition supports regular periods and helps PMS, especially anti-inflammatory diets with magnesium, vitamin B6, and vitamin D. More research is needed for specific dietary guidelines.

Case-control study, 2024

Do women with PCOS have worse PMS symptoms and mental health than women without it?

Yes, in this study women with PCOS had more severe PMS symptoms and worse mental health scores than women without PCOS.

Case report, 2024

Can maca, an herbal supplement, help with PCOS, PMS, dysmenorrhea, and hormone imbalances?

In this one woman with PCOS, yes - after three months of taking maca, her PMS symptoms, dysmenorrhea, and hormone levels improved, and these improvements lasted over two years. But this is one person's story, so we can't be sure it works for others.

Study, 2024

How do menstrual hormones affect sleep?

Hormones from the menstrual cycle affect sleep, mood, body temperature, and stress responses. Women with PMS or PCOS often have sleep problems, and women with more emotional premenstrual symptoms tend to be sleepier in the week before their period.

Cohort study, 2024

Do women with PCOS get worse mood symptoms before their period?

It is not clear yet. There are early hints that women with PCOS may have premenstrual mood flare-ups, but the research so far is too preliminary and inconsistent to say for sure.

Systematic review, 2024

Can saffron help with PMS, dysmenorrhea, and other women's health problems?

Yes, saffron appears to help with dysmenorrhea, PMS, menopause, and other reproductive issues through its antioxidant and hormone-regulating properties, though most evidence comes from lab studies.

Randomised trial, 2023

Does chaste tree help treat high prolactin levels related to PMS?

Some evidence suggests chaste tree might help with mild high prolactin levels, but the evidence is weak and unclear. We need larger, better studies.

Survey study, 2022

Does the menstrual cycle affect how well women sleep?

Sleep quality may worsen for some women during the premenstrual phase, but not all women experience this. When doctors evaluate women's sleep, they should ask which part of the cycle the woman is in, because this matters.

Survey study, 2022

What factors make PMS mood swings worse?

Stress, gynecological conditions like endometriosis and PCOS, and family history of bipolar disorder can worsen PMS. About two-thirds of women (67.4%) reported PMS and a quarter (25.6%) had PMDD.

Review, 2022

Can blocking a natural brain steroid help PMDD?

Maybe. An early study showed that blocking a steroid called allopregnanolone improved negative mood in women with PMDD compared with placebo, but more research is needed.

Interview study, 2022

Does practicing yoga reduce premenstrual syndrome and period pain?

In this small study, women who practiced yoga experienced clear reductions in period pain intensity, pain duration, and premenstrual syndrome scores.

Survey study, 2022

How does obesity affect the menstrual cycle in adolescents?

Adolescents with obesity are more likely to have irregular menstrual cycles, PCOS (polycystic ovary syndrome), and premenstrual disorders including PMS and PMDD. The hormonal changes in obesity help explain these connections.

Survey study, 2021

Are premenstrual symptoms linked to stress and poor quality of life in female students?

Yes. Students with mixed premenstrual symptoms had high levels of stress. Those with premenstrual symptoms did poorly on physical, social, and mental health aspects of quality of life.

Case report, 2020

Can psychosis get worse before your period if you have PCOS?

A woman with PCOS and schizoaffective disorder had psychotic episodes that happened right before her period and improved when bleeding started. This suggests a link between PCOS and menstrual-cycle-linked psychosis.

Survey study, 2019

How common is premenstrual syndrome among medical students?

About 3 out of 4 medical students in this study had PMS. Mood swings and anxiety were most common.

Case report, 2018

Can mood and psychotic symptoms happen before the period in women with PCOS?

Yes. One young woman with PCOS experienced three episodes of mixed mood and psychotic symptoms before her period. This is very rare.

Randomised trial, 2018

Does sleep affect the LH hormone differently in women with PCOS versus normal women?

Yes, though based on a very small study. In normal women, brief awakenings trigger LH hormone surges while REM sleep suppresses them, but in women with PCOS this pattern is reversed.

Survey study, 2016

Are women with PMS different in their hormones and metabolism?

Yes. Women with PMS had higher prolactin and triglycerides, and lower testosterone and HDL cholesterol than women without PMS. Higher PMS scores were associated with increased metabolic syndrome risk, though we cannot tell whether these differences cause PMS or result from it.

Review, 2014

Do birth control pills help PMS?

Yes. Birth control pills can treat and prevent premenstrual syndrome according to this review, though the abstract does not provide specific details about the strength of benefit.

Review, 2013

Does exercise help or hurt women's menstrual health?

Moderate exercise improves menstrual regularity and reproductive health. But excessive exercise without enough nutrition can cause loss of periods, weak bones, and eating disorders.

Survey study, 2012

Do women with PMDD have different ovaries or hormones than women without it?

Women with PMDD had significantly fewer developing egg follicles than women without PMDD, but did not have polycystic ovaries or higher male hormones as researchers expected.

Survey study, 2009

Can long-cycle birth control pills reduce PMS and menstrual symptoms?

Long-cycle birth control pills may reduce PMS and related symptoms by lowering hormonal fluctuations. This is based on clinical opinion rather than a controlled trial.

Case report, 2008

Can metformin help psychosis that happens with the menstrual cycle?

Maybe. One woman with polycystic ovary syndrome (PCOS) and menstrual-linked psychosis had significant improvement when metformin restored her normal menstrual cycle.

Survey study, 2005

What factors are associated with having a hysterectomy in women veterans?

Premenstrual syndrome was one of several factors. Women with PMS were 1.6 times more likely to have had a hysterectomy (OR 1.6, 95% CI 1.1-2.3). Other factors included older age, multiple pregnancies, and PCOS.

Survey study, 2001

Is acne linked to polycystic ovary syndrome, and do these conditions go with PMS?

Yes. High male hormone levels in PCOS cause acne, and in 93% of women with both conditions, acne severity matched PCOS severity and the presence of PMS.

Randomised trial, 1998

Is low-dose testosterone treatment safe for women with severe PMS?

Low-dose testosterone treatment caused small unfavorable changes in cholesterol that could increase heart disease risk, but did not damage the ovaries. This is a small comparison study without random assignment, so results are preliminary.

Case report, 1993

Can extreme sleepiness around periods be linked to prolactin and a medication called metoclopramide?

In one woman, severe sleepiness tied to her menstrual periods continued even after her periods stopped with metoclopramide, and this sleepiness was linked to high prolactin levels, but this is a single case and cannot tell us how common or treatable this is in general.

Review, 1987

How well do hormone-suppressing drugs work for treating gynaecological conditions?

This review suggests that hormone-suppressing drugs called LHRH agonists work well for several gynaecological conditions and have few serious side effects, though larger studies are needed to compare which drugs and doses work best.