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Life sciences · Interventional Study
ClinicalTrials.gov · September 23, 2026
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Interventional Study.
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Registry record from ClinicalTrials.gov (NCT07837193). This is a study registration, not published results. Lead sponsor: KU Leuven. Recruitment status: NOT_YET_RECRUITING. Phase: NA. Study type: INTERVENTIONAL. Enrollment: 572 participants (ESTIMATED). Conditions: Perinatal Mental Health, Gestational Weight Gain, Postpartum Weight Retention, Child Development. Interventions: BEHAVIORAL: HAP3 Family App. Primary outcome measures: Participant Recruitment Rate , At enrollment (enrollment can be at any gestational age); Participant Retention Rate , From enrollment until 6 months postpartum.; HAP3 Family App Acceptability , From enrollment until 6 months postpartum.; HAP3 Family App Usability , From enrollment until 6 months postpartum.; Motivation for Eating Behavior Change , Baseline, 32 weeks pregnancy, and 6 months postpartum.; Motivation for Mental Health Behavior Change , Baseline, 32 weeks pregnancy, and 6 months postpartum.. Brief summary: Healthy Adaptation to Pregnancy, Postpartum and Parenthood (HAP3) The HAP3 study is evaluating a new digital support program for pregnant women and their partners. The program includes the HAP3 Family App, which provides information and practical tools on healthy eating, physical activity, sleep, emotional well-being, pregnancy and postpartum care, healthy weight management, parenting, and child development. Researchers want to find out whether the app is easy to use, acceptable to families, and practical to implement during pregnancy and after birth. The study will also explore whether using the app may help improve parents' mental well-being, healthy lifestyle habits, weight management, and early child development. Participants will be randomly assigned to one of two groups. One group will receive access to the full HAP3 Family App, personalized coaching by phone or video call, and supportive messages. The other group will receive usual care and use the app only to complete study questionnaires. The study will follow families from pregnancy until six months after birth. Participants will complete questionnaires about their health, well-being, and parenting experiences. Those using the full app will also be asked to complete brief in-app check-ins about mood, sleep, stress, and daily habits. The HAP3 intervention is not a medical treatment and involves minimal risk. Potential benefits include increased awareness of health behaviors, access to evidence-based information, and support during the transition to parenthood. The study is being conducted by researchers from KU Leuven (Belgium), Vrije Universiteit Amsterdam (Netherlands), and Technische Universität Dresden (Germany) as part of the European HAP3 project.