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Updated: Jan 28, 2026

Using Chronic Social Stress to Model Postpartum Depression in Lactating Rodents
Published on: June 10, 2013
The international postpartum depression: action towards causes and treatment (PACT) consortium
Jerry Guintivano1, Karen T Putnam1, Patrick F Sullivan1,2,3
1a Department of Psychiatry , University of North Carolina at Chapel Hill , Chapel Hill , NC , USA.
Insights
The International Postpartum Depression: Action towards Causes and Treatment (PACT) Consortium is investigating the genetic basis of postpartum depression (PPD). This global effort aims to improve diagnosis and treatment for women experiencing perinatal mood disorders.
Area of Science:
- Perinatal Psychiatry
- Genetics
- Psychiatric Epidemiology
Background:
- Postpartum depression (PPD) is a significant mood disorder affecting women after childbirth.
- Understanding the genetic underpinnings of PPD is crucial for improving diagnostic and treatment strategies.
- Existing research often lacks the large sample sizes needed for robust genetic analyses.
Purpose of the Study:
- To establish an international perinatal psychiatry consortium (PACT) for large-scale investigations.
- To identify clinical subtypes of PPD contributing to diagnostic heterogeneity.
- To elucidate the genetic basis of PPD through a genome-wide association study.
Main Methods:
- Collaborative team science approach involving 19 institutions across seven continents.
- Recruitment of a large cohort of participants for PPD research.
- Utilizing a mobile app (PPD ACT) for participant identification and data collection.
- Partnership with the Major Depressive Disorder Working Group of the Psychiatric Genomics Consortium for genetic analysis.
Main Results:
- Recruited 17,912 participants to date.
- Identified 11,344 participants via the PPD ACT mobile app.
- Confirmed 8,432 PPD cases within the study cohort.
- Initiated the first large-scale genome-wide association study for PPD.
Conclusions:
- The PACT Consortium is generating a large dataset to enable statistically rigorous investigation of PPD.
- Identifying PPD subtypes and genetic factors will enhance diagnostic accuracy.
- The ultimate goal is to improve the detection, diagnosis, and treatment of perinatal mood disorders.
Abstract:
The International Postpartum depression: Action towards Causes and Treatment (PACT) Consortium was founded with the overarching goal of creating an international perinatal psychiatry consortium to conduct novel investigations with large sample sizes to understand the genetic signature of perinatal mood disorders. PACT uses a collaborative and team science approach that includes investigators across 19 institutions and seven continents. The large sample sizes allow for statistically rigorous analyses to investigate perinatal psychiatric disorders, with an initial focus on postpartum depression (PPD). Our current aims are to identify clinical sub-types of PPD that contribute diagnostic heterogeneity, and to elucidate the genetic basis of PPD by conducting the first large genome-wide association study of PPD. To accomplish the latter aim, we are partnering with the Major Depressive Disorder Working Group of the Psychiatric Genomics Consortium. To date, our consortium members have recruited 17,912 participants and 11,344 participants have been identified using the PPD ACT mobile app, of which 8,432 are PPD cases. Ultimately, we hope this approach will improve detection, diagnosis, and treatment of women who suffer from perinatal psychiatric disorders.
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