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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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testosterone production moderately in eugonadal men ( 11 ). Consequently, these substances are frequently used as PCT, based on the unproven assumption that they will speed up recovery of the male hypothalamic-pituitary-gonadal axis. Human chorionic

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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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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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hormone alone (Gonal-F, Merck-Serono, Israel or Puregon, MSD, Israel), (2) highly purified human menopausal gonadotropin alone (Menopur, Ferring) or (3) a combination of both. Estrogen and progesterone concentrations were routinely measured at every follow

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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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in many other non-human primates, including the rhesus monkey and marmoset ( 7 , 8 ). In humans and non-human primates after the rise in gonadotrophins and testosterone during early infancy, there follows a period of relative HPG quiescence during

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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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( n  = 8/7), scrotal ( n  = 2/2), not specified ( n  = 17/22) ( Fig. 2 ). Figure 2 Gonadal status in 56 males with Prader–Willi syndrome in relation to initial testicular position, response to treatment with human chorionic gonadotrophin (hCG

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Wolfgang Koechling Ferring Pharmaceuticals A/S, Copenhagen, Denmark

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Daniel Plaksin Bio-Technology General Israel Ltd, Ferring Pharmaceuticals, Kiryat Malachi, Israel

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Glenn E Croston Croston Consulting, San Diego, California, USA

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Janni V Jeppesen The Laboratory of Reproductive Biology, The Department of Fertility at The Juliane Marie Centre, Rigshospitalet, Copenhagen University Hospital and The University of Copenhagen, Copenhagen, Denmark

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Kirsten T Macklon The Laboratory of Reproductive Biology, The Department of Fertility at The Juliane Marie Centre, Rigshospitalet, Copenhagen University Hospital and The University of Copenhagen, Copenhagen, Denmark

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Claus Yding Andersen The Laboratory of Reproductive Biology, The Department of Fertility at The Juliane Marie Centre, Rigshospitalet, Copenhagen University Hospital and The University of Copenhagen, Copenhagen, Denmark

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human chorionic gonadotrophin . Endocrinology 1953 53 604 – 614 . ( doi:10.1210/endo-53-6-604 ) 25 Ishibashi S Hammer RE Herz J. Asialoglycoprotein receptor deficiency in mice lacking the minor receptor subunit . Journal of

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Jennifer K Y Ko Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong Special Administrative Region, Hong Kong, China

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Jinghua Shi Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Beijing, China

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Raymond H W Li Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong Special Administrative Region, Hong Kong, China

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William S B Yeung Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong Special Administrative Region, Hong Kong, China

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Ernest H Y Ng Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong Special Administrative Region, Hong Kong, China

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cetrorelix (Cetrotide®, Merck) 250 µg daily starting from the sixth day of stimulation. The initial dose of stimulation was determined according to the baseline antral follicle count (AFC). Human chorionic gonadotrophin (hCG) (Pregnyl® 5000 or 10,000 units or

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D Santi Unit of Endocrinology, Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
Unit of Endocrinology, Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy

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A R M Granata Unit of Endocrinology, Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy

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M Simoni Unit of Endocrinology, Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
Unit of Endocrinology, Unit of Endocrinology, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy

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.2164/jandrol.108.007278 ). 32 Liu PY Turner L Rushford D McDonald J Baker HW Conway AJ Handelsman DJ . Efficacy and safety of recombinant human follicle stimulating hormone (Gonal-F) with urinary human chorionic gonadotrophin for induction of

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Nathalie Ly Department of Endocrinology and Reproductive Medicine, Reference Center for Rare Endocrine Diseases of Growth and Development, Reference Center for Gynecological Rare Diseases, Hôpitaux Universitaires Pitié Salpêtrière-Charles Foix, Paris, France
EndoERN, APHP Consortium Pitie Salpetriere Hospital, Necker Hospital, Paris, France

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Sophie Dubreuil Department of Endocrinology and Reproductive Medicine, Reference Center for Rare Endocrine Diseases of Growth and Development, Reference Center for Gynecological Rare Diseases, Hôpitaux Universitaires Pitié Salpêtrière-Charles Foix, Paris, France
EndoERN, APHP Consortium Pitie Salpetriere Hospital, Necker Hospital, Paris, France

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Philippe Touraine Department of Endocrinology and Reproductive Medicine, Reference Center for Rare Endocrine Diseases of Growth and Development, Reference Center for Gynecological Rare Diseases, Hôpitaux Universitaires Pitié Salpêtrière-Charles Foix, Paris, France
EndoERN, APHP Consortium Pitie Salpetriere Hospital, Necker Hospital, Paris, France
Sorbonne University, Paris, France

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production by corpus luteum ( 2 , 3 , 5 , 7 ), both directly and synergistically with follicle-stimulating hormone (FSH) and human chorionic gonadotrophin (hCG) action. GH also has a role on oocyte quality. In vivo , Mendoza et al. show a positive

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Leqi He Department of Clinical Laboratory Medicine, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Xiaoying Li Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Zaoping Chen Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Wei Wang Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Kai Wang Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Xinmei Huang Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Qian Yang Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Wencai Ke Department of Clinical Laboratory Medicine, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Jun Liu Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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Bingbing Zha Department of Endocrinology, Fifth People’s Hospital of Shanghai Fudan University, Shanghai, China

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chorionic gonadotrophin alpha and beta subunits can be assessed throughout human pregnancy using immunoradiometric assays calibrated with the unaltered and thermally dissociated heterodimer . Journal of Endocrinology 1994 140 513 – 520 . ( https

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