Effective dietary interventions during pregnancy: a systematic review and meta-analysis of behavior change techniques to promote healthy eating

Abstract Improving dietary intake during pregnancy can mitigate adverse consequences for women and their children. The effective techniques and features for supporting and sustaining dietary change during pregnancy and postpartum are minimally reported. The primary aims of this systematic review and...

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Main Authors: Hannah O’Connor, Nina Meloncelli, Shelley A. Wilkinson, Anna Mae Scott, Lisa Vincze, Alita Rushton, Samantha Dawson, Jenna Hollis, Bree Whiteoak, Sarah Gauci, Susan de Jersey
Format: Article
Language:English
Published: BMC 2025-02-01
Series:BMC Pregnancy and Childbirth
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Online Access:https://doi.org/10.1186/s12884-025-07185-z
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author Hannah O’Connor
Nina Meloncelli
Shelley A. Wilkinson
Anna Mae Scott
Lisa Vincze
Alita Rushton
Samantha Dawson
Jenna Hollis
Bree Whiteoak
Sarah Gauci
Susan de Jersey
author_facet Hannah O’Connor
Nina Meloncelli
Shelley A. Wilkinson
Anna Mae Scott
Lisa Vincze
Alita Rushton
Samantha Dawson
Jenna Hollis
Bree Whiteoak
Sarah Gauci
Susan de Jersey
author_sort Hannah O’Connor
collection DOAJ
description Abstract Improving dietary intake during pregnancy can mitigate adverse consequences for women and their children. The effective techniques and features for supporting and sustaining dietary change during pregnancy and postpartum are minimally reported. The primary aims of this systematic review and meta-analysis were to summarise the effectiveness of dietary interventions for pregnant woman, identify which behaviour change techniques (BCTs) and intervention features were most frequently used and determine which were most effective at improving dietary intake. Six databases were searched to identify randomised control trials (RCTs) reporting on dietary intake in pregnant women over the age of sixteen, with an active intervention group compared to a control group receiving usual care or less intensive interventions. The Cochrane Risk of Bias Tool 1 was used to assess study validity. BCTs were coded by two authors using Michie et al.’s BCT taxonomy V1. A random effect model assessed intervention effects on indices of dietary quality and food groups (fruit, vegetables, grains and cereals, meat, and dairy) in relation to the use of BCTs and intervention features. Thirty- seven RCTs met the inclusion criteria. High heterogeneity was observed across intervention characteristics and measures of fidelity. Only half of the available BCTs were used, with eleven used once. The BCT category Reward and threat was successful in improving dietary quality and vegetable intake, whilst 'Action planning’ (1.4) from the category Goals and planning significantly improved dietary quality. Interventions delivered by a nutrition professional and those that included group sessions improved dietary quality more than those delivered by other health professionals, research staff, or application-delivered interventions and delivered via other modalities. Future dietary interventions during pregnancy should incorporate and report on BCTs used in the intervention. Successful design elements for improving antenatal dietary intake may include multimodal interventions delivered by nutrition professionals and the use of Rewards and Goal setting.
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spelling doaj-art-c8b61b06491646288837b1030b0331bd2025-02-09T12:59:05ZengBMCBMC Pregnancy and Childbirth1471-23932025-02-0125113110.1186/s12884-025-07185-zEffective dietary interventions during pregnancy: a systematic review and meta-analysis of behavior change techniques to promote healthy eatingHannah O’Connor0Nina Meloncelli1Shelley A. Wilkinson2Anna Mae Scott3Lisa Vincze4Alita Rushton5Samantha Dawson6Jenna Hollis7Bree Whiteoak8Sarah Gauci9Susan de Jersey10Faculty of Medicine, Centre for Health Services Research, The University of QueenslandFaculty of Medicine, Centre for Health Services Research, The University of QueenslandSchool of Pharmacy, Faculty of Health and Behavioural Sciences, The University of QueenslandNuffield Department of Population Health, The University of OxfordSchool of Health Sciences and Social Work, Griffith UniversityChief Allied Health Practitioner, Metro North HealthFood & Mood Centre, School of Medicine, Deakin UniversityHunter New England Population Health, Hunter New England Local Health DistrictCentre for Childhood Nutrition Research, Faculty of Health, Queensland University of Technology (QUT)Food & Mood Centre, School of Medicine, Deakin UniversityFaculty of Medicine, Centre for Health Services Research, The University of QueenslandAbstract Improving dietary intake during pregnancy can mitigate adverse consequences for women and their children. The effective techniques and features for supporting and sustaining dietary change during pregnancy and postpartum are minimally reported. The primary aims of this systematic review and meta-analysis were to summarise the effectiveness of dietary interventions for pregnant woman, identify which behaviour change techniques (BCTs) and intervention features were most frequently used and determine which were most effective at improving dietary intake. Six databases were searched to identify randomised control trials (RCTs) reporting on dietary intake in pregnant women over the age of sixteen, with an active intervention group compared to a control group receiving usual care or less intensive interventions. The Cochrane Risk of Bias Tool 1 was used to assess study validity. BCTs were coded by two authors using Michie et al.’s BCT taxonomy V1. A random effect model assessed intervention effects on indices of dietary quality and food groups (fruit, vegetables, grains and cereals, meat, and dairy) in relation to the use of BCTs and intervention features. Thirty- seven RCTs met the inclusion criteria. High heterogeneity was observed across intervention characteristics and measures of fidelity. Only half of the available BCTs were used, with eleven used once. The BCT category Reward and threat was successful in improving dietary quality and vegetable intake, whilst 'Action planning’ (1.4) from the category Goals and planning significantly improved dietary quality. Interventions delivered by a nutrition professional and those that included group sessions improved dietary quality more than those delivered by other health professionals, research staff, or application-delivered interventions and delivered via other modalities. Future dietary interventions during pregnancy should incorporate and report on BCTs used in the intervention. Successful design elements for improving antenatal dietary intake may include multimodal interventions delivered by nutrition professionals and the use of Rewards and Goal setting.https://doi.org/10.1186/s12884-025-07185-zPregnancyDietBehaviourMeta-analysisAntenatal interventionsBehaviour change techniques
spellingShingle Hannah O’Connor
Nina Meloncelli
Shelley A. Wilkinson
Anna Mae Scott
Lisa Vincze
Alita Rushton
Samantha Dawson
Jenna Hollis
Bree Whiteoak
Sarah Gauci
Susan de Jersey
Effective dietary interventions during pregnancy: a systematic review and meta-analysis of behavior change techniques to promote healthy eating
BMC Pregnancy and Childbirth
Pregnancy
Diet
Behaviour
Meta-analysis
Antenatal interventions
Behaviour change techniques
title Effective dietary interventions during pregnancy: a systematic review and meta-analysis of behavior change techniques to promote healthy eating
title_full Effective dietary interventions during pregnancy: a systematic review and meta-analysis of behavior change techniques to promote healthy eating
title_fullStr Effective dietary interventions during pregnancy: a systematic review and meta-analysis of behavior change techniques to promote healthy eating
title_full_unstemmed Effective dietary interventions during pregnancy: a systematic review and meta-analysis of behavior change techniques to promote healthy eating
title_short Effective dietary interventions during pregnancy: a systematic review and meta-analysis of behavior change techniques to promote healthy eating
title_sort effective dietary interventions during pregnancy a systematic review and meta analysis of behavior change techniques to promote healthy eating
topic Pregnancy
Diet
Behaviour
Meta-analysis
Antenatal interventions
Behaviour change techniques
url https://doi.org/10.1186/s12884-025-07185-z
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