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John Allotey, Lucinda Archer, Dyuti Coomar, Kym IE Snell, Melanie Smuk, Lucy Oakey, Sadia Haqnawaz, Ana Pilar Betrán, Lucy C Chappell, Wessel Ganzevoort, Sanne Gordijn, Asma Khalil, Ben W Mol, Rachel K Morris, Jenny Myers, Aris T Papageorghiou, Basky Thilaganathan, Fabricio Da Silva Costa, Fabio Facchinetti, Arri Coomarasamy, Akihide Ohkuchi, Anne Eskild, Javier Arenas Ramírez, Alberto Galindo, Ignacio Herraiz, Federico Prefumo, Shigeru Saito, Line Sletner, Jose Guilherme Cecatti, Rinat Gabbay-Benziv, Francois Goffinet, Ahmet A Baschat, Renato T Souza, Fionnuala Mone, Diane Farrar, Seppo Heinonen, Kjell Å Salvesen, Luc JM Smits, Sohinee Bhattacharya, Chie Nagata, Satoru Takeda, Marleen MHJ van Gelder, Dewi Anggraini, SeonAe Yeo, Jane West, Javier Zamora, Hema Mistry, Richard D Riley, Shakila Thangaratinam & for the IPPIC Collaborative Network.

John Allotey ^1,*, Lucinda Archer ², Dyuti Coomar ¹, Kym IE Snell ², Melanie Smuk ³, Lucy Oakey ¹, Sadia Haqnawaz ⁴, Ana Pilar Betrán ⁵, Lucy C Chappell ⁶, Wessel Ganzevoort ⁷, Sanne Gordijn ⁸, Asma Khalil ⁹, Ben W Mol ^10,11, Rachel K Morris ¹², Jenny Myers ¹³, Aris T Papageorghiou ⁹, Basky Thilaganathan ^9,14, Fabricio Da Silva Costa ¹⁵, Fabio Facchinetti ¹⁶, Arri Coomarasamy ¹, Akihide Ohkuchi ¹⁷, Anne Eskild ¹⁸, Javier Arenas Ramírez ¹⁹, Alberto Galindo ²⁰, Ignacio Herraiz ²¹, Federico Prefumo ²², Shigeru Saito ²³, Line Sletner ²⁴, Jose Guilherme Cecatti ²⁵, Rinat Gabbay-Benziv ²⁶, Francois Goffinet ^27,28, Ahmet A Baschat ²⁹, Renato T Souza ²⁵, Fionnuala Mone ³⁰, Diane Farrar ³¹, Seppo Heinonen ³², Kjell Å Salvesen ³³, Luc JM Smits ³⁴, Sohinee Bhattacharya ¹¹, Chie Nagata ³⁵, Satoru Takeda ³⁶, Marleen MHJ van Gelder ³⁷, Dewi Anggraini ³⁸, SeonAe Yeo ³⁹, Jane West ³¹, Javier Zamora ^1,40, Hema Mistry ⁴¹, Richard D Riley ², Shakila Thangaratinam ^1,42,

¹ WHO Collaborating Centre for Global Women’s Health, Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
² Centre for Prognosis Research, School of Medicine, Keele University, Keele, UK
³ Blizard Institute, Centre for Genomics and Child Health, Queen Mary University of London, London, UK
⁴ The Hildas, Dame Hilda Lloyd Network, WHO Collaborating Centre for Global Women’s Health, University of Birmingham, Birmingham, UK
⁵ Department of Reproductive and Health Research, World Health Organization, Geneva, Switzerland
⁶ Department of Women and Children’s Health, School of Life Course Sciences, King’s College London, London, UK
⁷ Department of Obstetrics, Amsterdam UMC University of Amsterdam, Amsterdam, the Netherlands
⁸ Faculty of Medical Sciences, University Medical Center Groningen, Groningen, the Netherlands
⁹ Fetal Medicine Unit, St George’s University Hospitals NHS Foundation Trust and Molecular and Clinical Sciences Research Institute, St George’s University of London, London, UK
¹⁰ Department of Obstetrics and Gynaecology, Monash University, Monash Medical Centre, Clayton, Victoria, Australia
¹¹ Aberdeen Centre for Women’s Health Research, Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
¹² Institute of Applied Health Research, University of Birmingham, Birmingham, UK
¹³ Maternal and Fetal Health Research Centre, Manchester Academic Health Science Centre, University of Manchester, Central Manchester NHS Trust, Manchester, UK
¹⁴ Tommy’s National Centre for Maternity Improvement, Royal College of Obstetrics and Gynaecology, London, UK
¹⁵ Maternal Fetal Medicine Unit, Gold Coast University Hospital and School of Medicine, Griffith University, Gold Coast, Queensland, Australia
¹⁶ Mother-Infant Department, University of Modena and Reggio Emilia, Emilia-Romagna, Italy
¹⁷ Department of Obstetrics and Gynecology, Jichi Medical University School of Medicine, Shimotsuke-shi, Tochigi, Japan
¹⁸ Akershus University Hospital, University of Oslo, Oslo, Norway
¹⁹ Hospital Universitario de Cabueñes, Gijón, Spain
²⁰ Fetal Medicine Unit, Maternal and Child Health and Development Network (SAMID), Department of Obstetrics and Gynaecology, Hospital Universitario, Instituto de Investigación Hospital, Universidad Complutense de Madrid, Madrid, Spain
²¹ Department of Obstetrics and Gynaecology, Hospital Universitario, Madrid, Spain
²² Department of Clinical and Experimental Sciences, University of Brescia, , Italy
²³ Department Obstetrics and Gynecology, University of Toyama, Toyama, Japan
²⁴ Deptartment of Pediatric and Adolescents Medicine, Akershus University Hospital, Sykehusveien, Norway
²⁵ Obstetric Unit, Department of Obstetrics and Gynecology, University of Campinas, Campinas, Brazil
²⁶ Maternal Fetal Medicine Unit, Department of Obstetrics and Gynecology, Hillel Yaffe Medical Center Hadera, Affiliated to the Ruth and Bruce Rappaport School of Medicine, Technion, Haifa, Israel
²⁷ Maternité Port-Royal, AP-HP, APHP, Centre-Université de Paris, FHU PREMA, Paris, France
²⁸ Université de Paris, INSERM U1153, Equipe de recherche en Epidémiologie Obstétricale, Périnatale et Pédiatrique (EPOPé), Centre de Recherche Epidémiologie et Biostatistique Sorbonne Paris Cité (CRESS), Paris, France
²⁹ Department of Gynecology and Obstetrics, Johns Hopkins University School of Medicine, MD, USA
³⁰ Centre for Public Health, Queen’s University, Belfast, , UK
³¹ Bradford Institute for Health Research, Bradford, UK
³² Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
³³ Department of Laboratory Medicine, Children’s and Women’s Health, Norwegian University of Science and Technology, Trondheim, Norway
³⁴ Care and Public Health Research Institute, Maastricht University Medical Centre, Maastricht, the Netherlands
³⁵ Center for Postgraduate Education and Training, National Center for Child Health and Development, Tokyo, Japan
³⁶ Department of Obstetrics and Gynecology, Juntendo University, Tokyo, Japan
³⁷ Department for Health Evidence, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, the Netherlands
³⁸ Faculty of Mathematics and Natural Sciences, Lambung Mangkurat University, South Kalimantan, Indonesia
³⁹ University of North Carolina at Chapel Hill, School of Nursing, NC, USA
⁴⁰ Clinical Biostatistics Unit, Hospital Universitario Ramón y Cajal (IRYCIS), Madrid, Spain
⁴¹ Warwick Medical School, University of Warwick, Warwick, UK
⁴² Birmingham Women’s and Children’s NHS Foundation Trust, Birmingham, UK
^* Corresponding author Email: j.allotey.1@bham.ac.uk

Disclosure of interests

Full disclosure of interests: Completed ICMJE forms for all authors, including all related interests, are available in the toolkit on the NIHR Journals Library report publication page at https://doi.org/10.3310/DABW4814.

Primary conflicts of interest: Basky Thilaganathan reports funding from Tommy’s Fund award and iPLACENTA. Fabricio Da Silva Costa is a member of the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG). Lucy C Chappell is Chief Executive Officer of the National Institute for Health and Care Research (NIHR). Asma Khalil is a member of the NIHR Funding Committee, an ISUOG trustee and Obstetric Lead at the National Maternity and Perinatal Audit (NMPA). Rachel K Morris is lead developer for Royal College of Obstetricians and Gynaecologists (RCOG) guideline on fetal growth restriction and a member of the Saving Babies Care Bundle steering group. Richard D Riley reports payment for Statistical Reviews for the BMJ and occasionally other journals, guest lecturer at McGill and royalties for textbooks edited. Ben W Mol is supported by a NHMRC Investigator grant (GNT1176437), reports consultancy for ObsEva and has received research funding from Ferring and Merck. Aris T Papageorghiou is supported by the NIHR Oxford Biomedical Research Centre (BRC). SeonAe Yeo reports grants from National Institute of Nursing Research (NINR). Alberto Galindo reports grants from Instituto de Salud Carlos III (Spanish Ministry of Economy, Industry and Competitiveness) and payment from Roche Diagnostics for lectures and expert advisory board membership. Ignacio Herraiz reports grants from Instituto de Salud Carlos III (Spanish Ministry of Economy, Industry and Competitiveness) and payment from Roche Diagnostics and Thermo-Fischer for lectures and expert advisory board membership. Sanne Gordijn reports payment from Roche as in-kind supply of sFLt/PLGF for fetal growth restriction studies CEPRA and grant from ZonMw. Arri Coomarasamy is a Funding Committee Member for EME.

Other authors do not report any competing interests.