Beyond Baby Blues: The Reality of Postpartum Depression

Negative feelings, mood swings, and hormonal changes that accompany pregnancy and birth, typically referred to as “baby blues”, are common and often temporary. For many women, however, this term does not encapsulate the intense, lasting psychological and physiological changes that can lead to prolonged depressive states with considerable health implications.

Although postpartum depression (PPD) is one of the most common complications of childbirth, impacting up to 1 in 5 women who have experienced pregnancy, PPD is still understudied and underdiagnosed, and stigma surrounding the disorder remains a significant roadblock to appropriate maternal care. For more on the wider challenges surrounding maternal mental health and access to appropriate care, read our previous article, “Listening to Women: A Wake-Up Call on Maternal Mental Health”.

Acknowledging the complex interplay between environmental, biological, and genetic risk factors contributing to the development of this disorder can not only help identify individuals at risk, but provide support and education for those navigating PPD during a period of intense life change. 

What is Postpartum Depression (PPD)?

PPD is a depressive disorder marked by symptom onset occurring in the period right before, during, or after childbirth, also known as the peripartum period. Mild anxiety and depression can be considered a normal postpartum experience, as 80% of women report weepiness, sadness, irritability, and anxiety up to 2 weeks after giving birth. The term “baby blues” has commonly been used to refer to this period of postpartum hormonal change. 

It is important to note that PPD is a serious condition marked by severe symptoms lasting more than 2 weeks, and is clinically distinct from the “baby blues” (Table 1). The most common symptoms of PPD include sleep disturbance, fatigue, anxiety, irritability, and anhedonia, or the inability to feel pleasure or joy from activities once found enjoyable. Suicidal ideation and worries about causing harm to the baby are also often reported. PPD falls under the larger umbrella of Major Depressive Disorder (MDD), and thus shares the same symptomatology. The key factor distinguishing PPD from MDD is the timing of symptom onset, which is specific to the peripartum period for PPD.  

Challenges of Diagnosing PPD

The challenge of defining PPD rests on how the peripartum and postpartum period are specified. The period after childbirth is technically defined as “within 4 weeks of delivery”, but many doctors and researchers recognise depressive symptoms under the category of PPD up to the first year after childbirth. 

This definition is critical for patients to receive appropriate diagnoses and access to care. Although symptoms of PPD and MDD are overall similar, early research has indicated that the timing of onset during the peripartum period might impact the symptoms patients experience. Women with later onset of PPD (8-12 weeks postpartum) may experience different symptoms than women with depression onset during pregnancy, as women with later onset are more likely to present with a subtype of PPD known as anxious anhedonia. Providing appropriate care depends on understanding how the period of onset, symptomatology, and risk factors affect the course of PPD for different patients, and research has just begun to unravel the complicated mechanisms that influence how PPD develops. 

Causes and Contributing Factors of PPD

Like many other psychological disorders, PPD has no singular root cause. Rather, the development of PPD is influenced by a variety of complex environmental factors, biological processes, genetic associations, and other risk factors (Table 2).

Environmental. The strongest predictor of whether an individual will develop PPD is a history of mood or anxiety disorders, especially if symptoms are active during pregnancy. Women with a history of MDD before the birth of their first child are 20 times more likely to develop PPD and have a higher risk of experiencing a more severe postpartum depressive episode. Many of the environmental risk factors associated with PPD are related to life stressors, particularly adverse life events, such as childhood sexual abuse, violence, or neglect. Everyday stressors like lack of social support, financial struggles, or marital stress can also contribute to a higher risk of developing PPD. 

Biological. Although PPD has not been consistently associated with specific hormone levels, research has indicated that PPD is more prevalent in a subset of women who are particularly sensitive to the hormonal changes that occur during and after pregnancy. Some researchers theorize that endocrine, epigenetic, and immunologic factors related to stress and adverse life events could trigger changes in biological processes related to PPD, such as regulation of reproductive hormones or neuroinflammatory responses. Results on these biological factors are mixed, likely due to the large diversity in physiology and symptoms among research participants. 

Genetic. Genetic factors could play a role in why some women are more susceptible to PPD than others. Twin and family studies have indicated that PPD is heritable, which means there is a genetic influence in the development of the disorder. Several genes related to MDD, such as catechol-O-methyltransferase (COMT) and monoamine oxidase (MAO), have also been associated with PPD. Timing is critical to understanding how genes relate to onset of depression during the peripartum period, as genetic factors have been shown to contribute more to PPD in the early postpartum period (6-8 weeks) compared to later periods (9-24 weeks). These environmental, biological, and genetic discrepancies could relate to why women with later onset PPD may experience different symptoms compared to women with earlier onset, although such research is still in the early stages. 

Why Understanding PPD Matters

The mechanisms contributing to PPD are highly interconnected, and the complexity of these interactive factors can make managing PPD a difficult undertaking. However, improving access to treatment for PPD is a critical component of maternal care, as a delay in diagnosis or misdiagnosis can lead to potentially devastating outcomes. 

Suicide accounts for approximately 20% of postpartum deaths, and maternal depression has been shown to have adverse effects on infant behavioural, emotional, and cognitive development. With such severe consequences for maternal well-being and infant development, proper acknowledgement and treatment of PPD is a crucial component of postpartum healthcare.

Stigma remains one of the most substantial roadblocks to providing care for many women. Although effective management strategies exist, such as medication, psychotherapy, and lifestyle interventions, available treatments are significantly underutilised, especially in low-income areas where mental health is not prioritized. However, every person can take steps to improve care for PPD through education and awareness. Aside from physical and psychological therapies, the most important aspect of treating PPD is acknowledging the serious and potentially life-threatening symptoms that impact a large number of women who have experienced pregnancy, and ensuring that those women are both believed and supported. 

References

• Batt, M. M., Duffy, K. A., Novick, A. M., Metcalf, C. A., & Epperson, C. N. (2020). Is postpartum depression different from depression occurring outside of the perinatal period? A review of the evidence. Focus (American Psychiatric Publishing), 18(2), 106–119. https://doi.org/10.1176/appi.focus.20190045

• Khamidullina, Z., Marat, A., Muratbekova, S., Mustapayeva, N. M., Chingayeva, G. N., Shepetov, A. M., Ibatova, S. S., Terzic, M., & Aimagambetova, G. (2025). Postpartum depression epidemiology, risk factors, diagnosis, and management: An appraisal of the current knowledge and future perspectives. Journal of Clinical Medicine, 14(7), 2418. https://doi.org/10.3390/jcm14072418

• Payne, J. L., & Maguire, J. (2019). Pathophysiological mechanisms implicated in postpartum depression. Frontiers in Neuroendocrinology, 52, 165–180. https://doi.org/10.1016/j.yfrne.2018.12.001

• Wierzbinska, E. M., & Susser, L. C. (2025). Postpartum depression and child mental health outcomes: Evidenced-based interventions. Current Treatment Options in Psychiatry, 12(1), 12. https://doi.org/10.1007/s40501-025-00347-y

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This article was written by Marilyn Curtis and edited by Neave Smith, with graphics produced by Saba Keshan. If you enjoyed this article, be the first to be notified about new posts by signing up to become a WiNUK member (top right of this page)! Interested in writing for WiNUK yourself? Contact us through the blog page and the editors will be in touch.