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Sakina Kherra CHU Parnet Hopital, Algiers, Algeria

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Wendy Forsyth Paterson Royal Hospital for Sick Children, Yorkhill, Glasgow, UK

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Filiz Mine Cizmecioglu Paediatric Endocrinology and Diabetes Department, Kocaeli University, Kocaeli, Turkey

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Jeremy Huw Jones Department of Pediatric Endocrinology, Royal Hospital for Children Glasgow, NHS Greater Glasgow and Clyde, Glasgow, UK

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Mariam Kourime Abderrahim Harouchi Hôpital, Casablanca, Morocco

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Heba Hassan Elsedfy Pediatrics Department, Ain Shams University, Cairo, Egypt

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Sameh Tawfik Department of Pediatrics, Maadi Hospital, Cairo, Egypt

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Andreas Kyriakou Department of Pediatric Endocrinology, Royal Hospital for Children Glasgow, NHS Greater Glasgow and Clyde, Glasgow, UK

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Mohamad Guftar Shaikh Department of Pediatric Endocrinology, Royal Hospital for Children Glasgow, NHS Greater Glasgow and Clyde, Glasgow, UK

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Malcolm David Cairns Donaldson Section of Child Health, Glasgow University School of Medicine, Glasgow, UK

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). Clinical features include small penis, scrotal hypoplasia and cryptorchidism at birth, with spontaneous puberty but mid-pubertal arrest and reduced testicular volume attributable to a reduction in seminiferous tubules. Basal gonadotrophins and testosterone

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Willem de Ronde Department of Internal Medicine, Spaarne Gasthuis, Haarlem, the Netherlands

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Diederik L Smit Department of Internal Medicine, Spaarne Gasthuis, Haarlem, the Netherlands

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). Oestrogens, although present in much smaller concentrations compared to androgens, have strong suppressive effects on gonadotrophin production ( 10 ). Anti-oestrogens, such as tamoxifen and clomiphene citrate, have been shown to stimulate gonadotrophin and

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Nardin Aslih Department of Obstetrics and Gynecology, MDIVF Unit, Hillel Yaffe Medical Center, IsraelTechnion – Israel Institute of Technology, Hadera, Haifa, Israel

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Mediea Michaeli Department of Obstetrics and Gynecology, MDIVF Unit, Hillel Yaffe Medical Center, IsraelTechnion – Israel Institute of Technology, Hadera, Haifa, Israel

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Diana Mashenko Department of Obstetrics and Gynecology, MDIVF Unit, Hillel Yaffe Medical Center, IsraelTechnion – Israel Institute of Technology, Hadera, Haifa, Israel

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Adrian Ellenbogen Department of Obstetrics and Gynecology, MDIVF Unit, Hillel Yaffe Medical Center, IsraelTechnion – Israel Institute of Technology, Hadera, Haifa, Israel

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Oshrit Lebovitz Department of Obstetrics and Gynecology, MDIVF Unit, Hillel Yaffe Medical Center, IsraelTechnion – Israel Institute of Technology, Hadera, Haifa, Israel

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Yuval Atzmon Department of Obstetrics and Gynecology, MDIVF Unit, Hillel Yaffe Medical Center, IsraelTechnion – Israel Institute of Technology, Hadera, Haifa, Israel

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Einat Shalom-Paz Department of Obstetrics and Gynecology, MDIVF Unit, Hillel Yaffe Medical Center, IsraelTechnion – Israel Institute of Technology, Hadera, Haifa, Israel

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amount of gonadotrophins, number of oocytes retrieved, number of M2, normal fertilization (2PN), number of transferred embryos, number of embryos available to freeze, embryo grade and morphokinetic scores and morphokinetic parameters by hours from

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R H M Dykgraaf Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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S Schalekamp-Timmermans Division of Obstetrics and Fetal Medicine, Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
Generation R Study Group, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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M C Adank Division of Obstetrics and Fetal Medicine, Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
Generation R Study Group, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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S A A van den Berg Department of Clinical Chemistry, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
Department of Internal Medicine, Academic Center for Thyroid Diseases, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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B M N van de Lang-Born Department of Clinical Chemistry, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
Department of Internal Medicine, Academic Center for Thyroid Diseases, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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T I M Korevaar Department of Internal Medicine, Academic Center for Thyroid Diseases, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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A Kumar Ansh Labs, Webster, Texas, USA

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B Kalra Ansh Labs, Webster, Texas, USA

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G V Savjani Ansh Labs, Webster, Texas, USA

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E A P Steegers Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
Division of Obstetrics and Fetal Medicine, Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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Y V Louwers Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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J S E Laven Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands

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. Placental biomarkers such as soluble fms-like tyrosine kinase-1 (sFLT), human chorionic gonadotrophin (hCG), and placental growth factor (PLGF) are known to be important representatives of placental (dys)function ( 21 ). These biomarkers have been associated

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Claire L Wood Department of Paediatric Endocrinology, Royal Victoria Infirmary, Newcastle upon Tyne, UK
Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK

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Kieren G Hollingsworth Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK

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Edrina Bokaie Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK

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Eric Hughes Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK

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Robert Muni-Lofra Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK

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Anna Mayhew Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK

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Rod T Mitchell MRC Centre for Reproductive Health, The University of Edinburgh, Queens Medical Research Institute, Edinburgh, UK

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Michela Guglieri Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK

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Joseph McElvaney Department of Paediatric Endocrinology, Royal Victoria Infirmary, Newcastle upon Tyne, UK

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Timothy D Cheetham Department of Paediatric Endocrinology, Royal Victoria Infirmary, Newcastle upon Tyne, UK
Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK

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Volker Straub Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK
John Walton Muscular Dystrophy Research Centre, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK

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-Mullerian hormone (AMH) and inhibin B levels, which were analysed by ELISA after transportation to the Protein Reference Unit in Sheffield Gonadotrophin function – luteinising hormone (LH) and follicle-stimulating hormone (FSH) concentrations as previously

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Imane Benabbad Endocrinology and Diabetes Unit, Eli Lilly, Neuilly-sur-Seine, France

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Myriam Rosilio Endocrinology and Diabetes Unit, Eli Lilly, Neuilly-sur-Seine, France

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Maité Tauber Department Endocrine, Bone Diseases, Genetics, Obesity, and Gynecology Unit, Children’s Hospital, University Hospital, Toulouse, France

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Emmanuel Paris BioClinica, Lyon, France

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Anne Paulsen Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Universitaire Robert-Debré, Department of Pediatric Endocrinology and Diabetology, and Centre de Référence des Maladies Endocriniennes Rares de la Croissance, Paris, France

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Lovisa Berggren Eli Lilly and Company, Bad Homburg, Germany

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Hiren Patel Eli Lilly and Company, Indianapolis, Indiana, USA

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Jean-Claude Carel Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Universitaire Robert-Debré, Department of Pediatric Endocrinology and Diabetology, and Centre de Référence des Maladies Endocriniennes Rares de la Croissance, Paris, France
Assistance Publique-Hôpitaux de Paris (AP-HP), Hôpital Universitaire Robert-Debré, Department of Pediatric Endocrinology and Diabetology, and Centre de Référence des Maladies Endocriniennes Rares de la Croissance, Paris, France

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the Phoenix Study Group
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of ISS are often referred late, with GH treatment initiated when puberty has already started. Gonadotrophin-releasing hormone (GnRH) agonists administered alone for 2–3 years in this patient population delay puberty and epiphyseal closure but decrease

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Magdalena Lech Faculty of Life Sciences and Medicine, School of Life Course Sciences, King’s College London, London, UK

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Ruvini Ranasinghe Department of Clinical Biochemistry, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK

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Royce P Vincent Department of Clinical Biochemistry, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK
Faculty of Life Sciences and Medicine, School of Life Course Sciences, King’s College London, London, UK

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David R Taylor Department of Clinical Biochemistry, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK

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Lea Ghataore Department of Clinical Biochemistry, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK

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James Luxton Department of Clinical Biochemistry, King’s College Hospital NHS Foundation Trust, Denmark Hill, London, UK

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Fannie Lajeunesse-Trempe Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK
Quebec Heart and Lung Institute, Laval University, Quebec, Canada

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Pia Roser Department of Endocrinology and Diabetes, University Medical Centre Hamburg Eppendorf, Hamburg, Germany

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Eftychia E Drakou Department of Clinical Oncology, Guy's Cancer Centre - Guy's and St Thomas' NHS Foundation Trust, Great Maze Pond, London, UK

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Ling Ling Chuah Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK

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Ashley B Grossman Green Templeton College, University of Oxford, Oxford, UK
Barts and the London School of Medicine, Centre for Endocrinology, William Harvey Institute, London, UK
Neuroendocrine Tumour Unit, Royal Free Hospital, London, UK

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Simon J B Aylwin Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK

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Georgios K Dimitriadis Department of Endocrinology ASO/EASO COM, King's College Hospital NHS Foundation Trust, Denmark Hill, London, UK
Obesity, Type 2 Diabetes and Immunometabolism Research Group, School of Cardiovascular and Metabolic Medicine & Sciences, Faculty of Life Course Sciences, King’s College London, London, UK
Division of Reproductive Health, Warwick Medical School, University of Warwick, Coventry, UK

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), adrenocorticotrophic hormone (ACTH), cortisol-binding globulin (CBG), thyroxine-binding globulin (TBG), gonadotrophins, DHEAS, testosterone and plasma EDTA ACTH were collected using BD Vacutainer during the same venepuncture. Samples were stored at −80°C until analysis

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Herjan J T Coelingh Bennink Pantarhei Oncology, Zeist, The Netherlands

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Jan Krijgh Pantarhei Oncology, Zeist, The Netherlands

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Jan F M Egberts Terminal 4 Communications, Hilversum, The Netherlands

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Maria Slootweg Independent Consultant, Zeist, The Netherlands

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Harm H E van Melick Department of Urology, St. Antonius Hospital, Nieuwegein, The Netherlands

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Erik P M Roos Department of Urology, Antonius Hospital, Sneek, The Netherlands

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Diederik M Somford Department of Urology, Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands

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Yvette Zimmerman Pantarhei Oncology, Zeist, The Netherlands

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Iman J Schultz Pantarhei Oncology, Zeist, The Netherlands

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Noel W Clarke The Christie and Salford Royal NHS Foundation Trusts, Manchester, UK

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R Jeroen A van Moorselaar Department of Urology, Amsterdam UMC, VU University, Amsterdam, The Netherlands

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Frans M J Debruyne Andros Clinics, Arnhem, The Netherlands

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triptorelin, leuprolide and goserelin are used as ADT ( 4 ). More recently, gonadotrophin-releasing hormone (GnRH) antagonists such as degarelix and relugolix have been developed ( 1 , 5 ). At present, ‘Standard of Care’ for advanced or metastatic PCa is ADT

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Mei Li Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China

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Yanfei Chen Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China

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Binrong Liao Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China

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Jing Tang Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China

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Jingzi Zhong Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China

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Dan Lan Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China

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’s correlation. The relationships among MKRN3, kisspeptin, and gonadotrophins were assessed by using Spearman’s rank-order. P value less than 0.05 was considered to be statistically significant. A receiver operating characteristic (ROC) was constructed for

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Jan-Bernd Stukenborg NORDFERTIL Research Lab Stockholm, Pediatric Endocrinology Unit, Department of Women’s and Children’s Health, Karolinska Institutet and University Hospital, Stockholm, Sweden

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Kirsi Jahnukainen NORDFERTIL Research Lab Stockholm, Pediatric Endocrinology Unit, Department of Women’s and Children’s Health, Karolinska Institutet and University Hospital, Stockholm, Sweden
Division of Haematology-Oncology and Stem Cell Transplantation, Children’s Hospital, University of Helsinki, Helsinki University Central Hospital, Helsinki, Finland

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Marsida Hutka MRC Centre for Reproductive Health, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK

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Rod T Mitchell MRC Centre for Reproductive Health, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
Edinburgh Royal Hospital for Sick Children, Edinburgh, UK

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testicular development and function Secretion of gonadotrophins, luteinising hormone (LH) and follicle-stimulating hormone (FSH), from the pituitary gland is responsible for regulating hormonal control of the testis in the male. LH and FSH signal through

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