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Thomas G Hill Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, Churchill Hospital, University of Oxford, Oxford, UK

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Lorna I F Smith Diabetes Research Group, School of Cardiovascular and Metabolic Medicine and Sciences, King’s College London, London, UK

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Inmaculada Ruz-Maldonado Department of Internal Medicine (Endocrinology), Yale University, New Haven, Connecticut, USA

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Peter M Jones Diabetes Research Group, School of Cardiovascular and Metabolic Medicine and Sciences, King’s College London, London, UK

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James E Bowe Diabetes Research Group, School of Cardiovascular and Metabolic Medicine and Sciences, King’s College London, London, UK

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Introduction Pregnancy is characterised by a shift in maternal metabolism with a progressive increase in maternal insulin resistance to prioritise nutrient flow to the growing fetus ( Battaglia & Meschia 1978 , Hay 1991 , Baumann et al

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Sian J S Simpson Department of Diabetes, School of Life Course Sciences, Faculty of Life Science and Medicine, King’s College London, London, UK

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Lorna I F Smith Department of Diabetes, School of Life Course Sciences, Faculty of Life Science and Medicine, King’s College London, London, UK

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Peter M Jones Department of Diabetes, School of Life Course Sciences, Faculty of Life Science and Medicine, King’s College London, London, UK

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James E Bowe Department of Diabetes, School of Life Course Sciences, Faculty of Life Science and Medicine, King’s College London, London, UK

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. There is some evidence that placentally derived CRH and urocortins are involved in various biological functions associated with pregnancy ( Thomson 2013 , You et al . 2014 ). Thus, pregnancy represents one possible physiological state in which the

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Antonia Hufnagel University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, Level 4, Addenbrooke’s Hospital, Cambridge, Cambridgeshire, UK

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Laura Dearden University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, Level 4, Addenbrooke’s Hospital, Cambridge, Cambridgeshire, UK

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Denise S Fernandez-Twinn University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, Level 4, Addenbrooke’s Hospital, Cambridge, Cambridgeshire, UK

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Susan E Ozanne University of Cambridge Metabolic Research Laboratories and MRC Metabolic Diseases Unit, Wellcome Trust-MRC Institute of Metabolic Science, Level 4, Addenbrooke’s Hospital, Cambridge, Cambridgeshire, UK

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Introduction Around 50% of women worldwide enter pregnancy overweight or obese ( Hill et al. 2019 ). Maternal obesity is the main risk factor for the development of gestational diabetes mellitus (GDM) in pregnancy, which affects

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Seokwon Jo Department of Integrative Biology & Physiology, University of Minnesota Medical School, Minneapolis, Minnesota, USA

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Emilyn U Alejandro Department of Integrative Biology & Physiology, University of Minnesota Medical School, Minneapolis, Minnesota, USA

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mechanistic investigations in this area are still limited. The concept of Developmental Origins of Health and Disease (aka DOHaD) suggests that the time during pregnancy, in the womb, and right after birth are crucial periods that significantly influence how

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Ying Sze Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, UK
The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian, UK

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Joana Fernandes The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian, UK

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Zofia M Kołodziejczyk Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, UK

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Paula J Brunton Centre for Discovery Brain Sciences, University of Edinburgh, Edinburgh, UK
The Roslin Institute, University of Edinburgh, Easter Bush Campus, Midlothian, UK
Zhejiang University-University of Edinburgh Institute, International Campus, Haining, Zhejiang, P.R. China

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Introduction Stress experienced during pregnancy has detrimental effects on the offspring across the life course, beginning during fetal development, persisting through the postnatal period and into adulthood ( Glover et al. 2018 ). This

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David R Grattan Centre for Neuroendocrinology and Department of Anatomy, Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, PO Box 913, Dunedin 9054, New Zealand
Centre for Neuroendocrinology and Department of Anatomy, Maurice Wilkins Centre for Molecular Biodiscovery, University of Otago, PO Box 913, Dunedin 9054, New Zealand

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hyperprolactinemia during lactation, and thereby promote the milk production that is essential to this state, there is an apparent loss of sensitivity of the short-loop feedback system during late pregnancy and lactation ( Grattan et al . 2008 ). This is a

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Antonio Gázquez Department of Physiology, CEIR Campus Mare Nostrum, University of Murcia, Biomedical Research Institute of Murcia, Murcia, Spain

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Francisca Rodríguez Department of Physiology, CEIR Campus Mare Nostrum, University of Murcia, Biomedical Research Institute of Murcia, Murcia, Spain

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María Sánchez-Campillo Department of Physiology, CEIR Campus Mare Nostrum, University of Murcia, Biomedical Research Institute of Murcia, Murcia, Spain

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Lidia E Martínez-Gascón Department of Clinical Analysis, Biomedical Research Institute of Murcia, Santa Lucia General University Hospital, Murcia, Spain

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Marino B Arnao Department of Plant Biology (Plant Physiology), University of Murcia, Murcia, Spain

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Pedro Saura-Garre Department of Clinical Psychology, University Clinical Hospital Virgen de la Arrixaca, Murcia, Spain

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María D Albaladejo-Otón Department of Clinical Analysis, Biomedical Research Institute of Murcia, Santa Lucia General University Hospital, Murcia, Spain

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Elvira Larqué Department of Physiology, CEIR Campus Mare Nostrum, University of Murcia, Biomedical Research Institute of Murcia, Murcia, Spain

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is affected by hyperglycaemia in pregnancy, most of those due to GDM ( International Diabetes Federation 2017 ). GDM is associated with neonatal adverse outcomes such as large for gestational age infants and increased risk of obesity and

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Erica Yeo Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON, Canada

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Patricia L Brubaker Department of Physiology, University of Toronto, Toronto, ON, Canada
Department of Medicine, University of Toronto, Toronto, ON, Canada

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Deborah M Sloboda Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON, Canada
Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON, Canada
Department of Obstetrics, Gynecology and Pediatrics, McMaster University, Hamilton, ON, Canada

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Introduction To accommodate the dynamic energy demands of pregnancy, while still maintaining metabolic homeostasis, significant alterations to maternal metabolism are required ( Fig. 1 ). Impaired or inappropriate maternal adaptations can

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Judith E Cartwright
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Paula Juliet Williams Division of Biomedical Sciences, Human Genetics Research Group, St George's University of London, Cranmer Terrace, London SW17 0RE, UK

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control of the gonadotrophic axis, KISS1 has been found to be important in placentation, pregnancy and cardiovascular function ( Bilban et al . 2004 , Hiden et al . 2007 , Mead et al . 2007 b ). The physiological importance of KISS1 is further

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Emma Castrique Henry Wellcome Labs for Integrative Neuroscience and Endocrinology, Division of Molecular Neuroendocrinology, Department of Cellular and Molecular Medicine, University of Bristol, Dorothy Hodgkin Building, Whitson Street, Bristol BS1 3NY, UK

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Marta Fernandez-Fuente Henry Wellcome Labs for Integrative Neuroscience and Endocrinology, Division of Molecular Neuroendocrinology, Department of Cellular and Molecular Medicine, University of Bristol, Dorothy Hodgkin Building, Whitson Street, Bristol BS1 3NY, UK

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Paul Le Tissier Henry Wellcome Labs for Integrative Neuroscience and Endocrinology, Division of Molecular Neuroendocrinology, Department of Cellular and Molecular Medicine, University of Bristol, Dorothy Hodgkin Building, Whitson Street, Bristol BS1 3NY, UK

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Andy Herman Henry Wellcome Labs for Integrative Neuroscience and Endocrinology, Division of Molecular Neuroendocrinology, Department of Cellular and Molecular Medicine, University of Bristol, Dorothy Hodgkin Building, Whitson Street, Bristol BS1 3NY, UK

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Andy Levy Henry Wellcome Labs for Integrative Neuroscience and Endocrinology, Division of Molecular Neuroendocrinology, Department of Cellular and Molecular Medicine, University of Bristol, Dorothy Hodgkin Building, Whitson Street, Bristol BS1 3NY, UK

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the physical expansion of the pituitary during pregnancy and lactation ( Gonzalez et al . 1988 , Elster et al . 1991 , Dinc et al . 1998 , Chanson et al . 2001 ). Several morphometric studies have identified the prolactin (PRL) cell population

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