--- title: Is PMDD just normal menstrual cycle mood changes amplified? | Niyora description: No. In healthy young women, most mood variation (79%-98%) was from day-to-day changes, not from premenstrual patterns. Each person's mood pattern stayed the s url: https://niyora.com/research/papers/variance-in-mood-symptoms-across-menstrual-cycles-implications-for-premenstrual-2017/ --- - [Niyora](https://niyora.com/) - [Research](https://niyora.com/research/) - [Library](https://niyora.com/research/library/) - Is PMDD just normal menstrual cycle mood changes amplified? Lab study, 2017 # Is PMDD just normal menstrual cycle mood changes amplified? No. In healthy young women, most mood variation (79%-98%) was from day-to-day changes, not from premenstrual patterns. Each person's mood pattern stayed the same from cycle to cycle, suggesting PMDD is different from normal mood variation. Moderate study design 27 healthy women aged 18-35 with regular menstrual cycles ## What they did Asked 27 healthy women aged 18-35 to report their mood every day (measuring depression, nervousness, irritability, and fatigue) for 2 to 6 consecutive menstrual cycles. Researchers analyzed how much of the mood variation was due to daily changes, cycle phase, or individual differences. ## What they found Most mood variation (79%-98%) came from day-to-day changes and did not follow a standard pattern of high mood before the period and low mood after menstruation starts. Each woman had her own stable mood pattern from cycle to cycle. ## What it means for you PMDD is not simply an exaggerated version of normal mood swings that all women experience. This suggests tracking your own individual mood patterns over time might be more useful than comparing to what doctors expect. However, the study only included psychologically healthy young women with regular cycles, so it may not apply to women who actually have PMDD or to other age groups. 27 women studied 18-35 age range 79%-98% mood variation from daily change, not premenstrual pattern ## About the study Original title Variance in Mood Symptoms Across Menstrual Cycles: Implications for Premenstrual Dysphoric Disorder Authors Lorenz TK, Gesselman AN, Vitzthum VJ Journal Women's reproductive health (Philadelphia, Pa.) Year 2017 Study design Lab study Participants 27 Open access Yes Read the paper [doi.org/10.1080/23293691.2017.1326248](https://doi.org/10.1080/23293691.2017.1326248) ## Topics [Premenstrual dysphoric disorder (PMDD)](https://niyora.com/research/topics/condition-pmdd/)[Menstrual cycle and mood](https://niyora.com/research/topics/condition-cycle-mood/)[Low mood and depression](https://niyora.com/research/topics/symptom-depression-mood/) Research tells you what helps on average. Niyora helps on the day it hits. Calm down, see it another way, and decide what to say, with a PMS and PMDD app built by a doctor. ## Related studies Cohort study, 2026 What genetic factors are linked to premenstrual symptoms? Study, 2026 How do women with PMDD process emotions differently in their brains? Systematic review, 2026 Can digital tools help diagnose PMDD? Systematic review, 2026 Why do some women experience mood changes linked to their menstrual cycle? Case-control study, 2026 Do women with PMS handle emotions differently at different times of the cycle? Systematic review, 2025 How do cognition and behavior change across the menstrual cycle in people with PMDD? Ask AI about this page Copy prompt ChatGPT ↗ Claude ↗ Perplexity ↗ Google AI Mode ↗ Grok ↗