Study reveals strong bidirectional relationship between perinatal depression and premenstrual disorders

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Women affected by premenstrual disorders have a higher risk of perinatal depression compared with those who do not, according to research published March 28th in the open access journal PLOS Medicine. The relationship works both ways: those with perinatal depression are also more likely to develop premenstrual disorders after pregnancy and childbirth. This study suggests that a common mechanism might contribute to the two conditions.

Menstruating women experience cyclical hormone fluctuations through puberty, menstrual cycle, pregnancy and menopause. Some women have difficult to manage symptoms of low mood and depression during these fluctuations. Between a fifth and a third of women are reportedly affected by premenstrual disorders and 11% of mothers suffer perinatal depression -; depressive symptoms during pregnancy and up to 12 months after delivery.

Qian Yang and colleagues at the Karolinska Institutet, Sweden and University of Iceland used the Swedish nationwide registers from 2001 to 2018 and identified 84,949 women with perinatal depression and 849,482 unaffected women. The researchers matched the women on age and calendar year, and further controlled for demographic factors, smoking, BMI, parity and history of psychiatric disorders. Among women with perinatal depression, almost 3% had premenstrual disorders before pregnancy compared with 0.6% of matched unaffected women. Women with perinatal depression were also twice as likely to report premenstrual disorders when the menstruation resumed after childbirth, compared to those unaffected by perinatal depression.

The research sheds light on the association between the two conditions and supports a theory that they may share underlying biological mechanisms and/or risk factors. Understanding this association could help healthcare providers to better target support to women most likely to be affected.

The authors add, "This study reveals a strong bidirectional relationship between perinatal depression and premenstrual disorders, using data from over 900,000 pregnancies. The findings suggest that both disorders may exist on a continuum, and emphasize the importance of recognizing these susceptibilities in clinical practice."

Source:
Journal reference:

Yang, Q., et al. (2024) The bidirectional association between premenstrual disorders and perinatal depression: A nationwide register-based study from Sweden. PLOS Medicine. doi.org/10.1371/journal.pmed.1004363.

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