---
title: Can disrupted sleep and body rhythms explain mood problems around periods, pregnancy, or after birth?
description: It's a promising idea but not yet proven. Women with depression at these times show a different pattern of sleep and body rhythms than healthy women, though t
url: https://niyora.com/research/papers/sleep-rhythms-and-women-s-mood-part-i-menstrual-cycle-pregnancy-and-postpartum-2006/
---

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- Can disrupted sleep and body rhythms explain mood problems around periods, pregnancy, or after birth?

Case-control study, 2006

# Can disrupted sleep and body rhythms explain mood problems around periods, pregnancy, or after birth?

It's a promising idea but not yet proven. Women with depression at these times show a different pattern of sleep and body rhythms than healthy women, though the exact pattern differs by life stage.

 Early or limited evidence

Women with DSM-IV depression vs healthy women, studied across menstrual cycle, pregnancy and postpartum (review).

## What they did

The authors reviewed studies comparing sleep and biological rhythms (melatonin, body temperature, cortisol, thyroid hormone, prolactin) in women formally diagnosed with depression versus healthy women, during the menstrual cycle, pregnancy, and the postpartum period.

## What they found

Each reproductive stage (premenstrual, pregnancy, postpartum) has its own distinct sleep and rhythm pattern that separates depressed from healthy women, though some features overlap, such as raised prolactin levels.

## What it means for you

If disrupted rhythms do drive these mood disorders, treatments that correct the timing or strength of these rhythms could help. But this is a review of other studies, not new research, and more work is needed to pin down the exact patterns.

## About the study

Original title Sleep, rhythms and women's mood. Part I. Menstrual cycle, pregnancy and postpartum Authors Parry BL, Martínez LF, Maurer EL et al. Journal Sleep medicine reviews Year 2006 Study design Case-control study What was tested None tested directly; review discusses treatment strategies aimed at correcting rhythm problems. Read the paper [doi.org/10.1016/j.smrv.2005.09.003](https://doi.org/10.1016/j.smrv.2005.09.003)

## Topics

[Menstrual cycle and mood](https://niyora.com/research/topics/condition-cycle-mood/)[Low mood and depression](https://niyora.com/research/topics/symptom-depression-mood/)[Sleep and insomnia](https://niyora.com/research/topics/symptom-sleep/)[Major depressive disorder](https://niyora.com/research/topics/comorbidity-major-depression/)[Pregnancy and postpartum](https://niyora.com/research/topics/comorbidity-postpartum/)[Thyroid disorders](https://niyora.com/research/topics/comorbidity-thyroid/)[Work and productivity](https://niyora.com/research/topics/life-area-work/)

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

Randomised trial, 2001

Do changing reproductive hormones disrupt the body's internal clock and cause mood disorders?

Study, 2026

What are premenstrual syndrome and premenstrual dysphoric disorder?

Review, 2019

How do brain changes during reproductive transitions cause depression in women?

Review, 2012

Is depression linked to hormonal changes during the menstrual cycle, pregnancy, and menopause?

Case-control study, 2004

Do menstrual characteristics and pregnancy history predict depression risk?

Review, 2023

How does the stress response system affect depression during reproductive stages like PMDD?

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