Breastfeeding interventions for preventing postpartum depression

BACKGROUND: Postpartum depression is a debilitating mental health disorder, which occurs in approximately 6% to 13% of women who give birth in high-income countries. It is a cause of great suffering for women and can have long-term consequences for child development. Postpartum depression can also negatively influence breastfeeding duration and breastfeeding exclusivity (i.e. feeding the infant only breast milk). However, a positive early, and continued, breastfeeding experience may reduce the risk of having postpartum depression. Breastfeeding interventions that increase the duration and exclusivity of breastfeeding may help prevent or reduce postpartum depressive symptoms. OBJECTIVES: The primary objective of this review was to assess the effect (benefits and harms) of breastfeeding support interventions, in comparison to standard perinatal care, on maternal postpartum depression. The secondary objective was to assess whether breastfeeding support interventions had an effect on depression symptoms, and whether the effect was dependent on the duration and exclusivity of breastfeeding. SEARCH METHODS: We searched CENTRAL (Wiley), MEDLINE ALL (Ovid), Embase (Ovid), PsycINFO (Ovid), CINAHL Complete (Ebsco) and several other bibliographic databases and trial registers. The most recent search was conducted in June 2024. SELECTION CRITERIA: Randomised controlled trials (RCTs) that evaluated educational, psychosocial, pharmacological, alternative (any breastfeeding support intervention that promotes relaxation and reduces stress) or herbal breastfeeding support interventions targeting the prevention or reduction of postpartum depression were eligible for inclusion. DATA COLLECTION AND ANALYSIS: Each title and abstract we identified was screened by two authors independently. Two review authors then independently examined full-text manuscripts to decide if the study met the inclusion criteria. If so, they extracted data from included studies using Covidence software. Two review authors also independently conducted a risk of bias assessment of each study using the RoB 2 tool. We contacted study authors when necessary for more information. We conducted meta-analyses using a random-effects model. MAIN RESULTS: = 29%; 571 participants; very low-certainty evidence). We found low-certainty evidence that a psychosocial breastfeeding intervention may increase the duration of breastfeeding in the long term (RR 1.64, 95% CI 1.08 to 2.50; 129 participants; low-certainty evidence). For the comparison of alternative breastfeeding intervention versus standard care (which was evaluated in only one study), there was no difference between groups immediately post-intervention in anxiety measured with the State-Trait Anxiety Inventory (STAI); range 20 to 80; higher scores indicate more severe anxiety symptoms (MD 1.80, 95% CI -9.41 to 13.01; 60 participants; very low-certainty evidence), or in stress measured with the Perceived Stress Scale (PSS)-NICE; range 1 to 230, higher scores indicate higher levels of stress (MD 1.90, 95% CI -10.28 to 14.08; 60 participants; very low-certainty evidence), but the evidence is very uncertain. No adverse events connected to the intervention itself were stated in any of the trials, but for most studies, we do not know if this is because there were none or because they were not measured or reported. AUTHORS' CONCLUSIONS: There is low-certainty evidence that psychosocial breastfeeding interventions may prevent postpartum depression in the short term and increase the duration of breastfeeding in the long-term. The evidence is very uncertain about the effect of psychosocial breastfeeding interventions on other outcomes. The evidence is very uncertain about the effect of alternative breastfeeding interventions on postpartum depression or other outcomes. The included studies did not report any adverse events directly related to the interventions, but it is not clear if this outcome was measured in most studies. Future trials of breastfeeding interventions should be conducted carefully to reduce their risk of bias, and they should be large enough to detect differences between mothers in their mental health.

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