We are excited to share the results of recent research published by the P3 Cohort team using data from the P3 Cohort.

Impact of Couple vs. Individual Participation in Pregnancy Research: A Comparative Analysis of Participant Characteristics and Study Retention (2025)

In this recent study, published in Annals of Epidemiology, members of the P3 Cohort team explored whether having partners participate in pregnancy research affects who joins studies and how long participants stay involved. Partner participation in research is becoming more common, but its impact on study engagement is not well understood.

Using data from the P3 Cohort, the study found that participants whose partners also took part were slightly more likely to remain in the study through the first year after birth. Specifically, 98.9% of participants with partner involvement stayed in the study, compared to 97.1% of those whose partners did not participate.

These results suggest that involving partners may help improve participant retention and support longer-term engagement in pregnancy research. This can help researchers better understand family health and experiences during and after pregnancy.

To read the paper, click here.

Lambert T, Stephenson N, Skiffington J, Slater D, Leijser LM, Metcalfe A. Impact of couple vs. individual participation in pregnancy research: A comparative analysis of participant characteristics and study retention. Annals of Epidemiology. 2025; 111, 163-167.