Niels Erik Skakkebæk
Affiliate Professor
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A Brief Review of the Link between Environment and Male Reproductive Health: Lessons from Studies of Testicular Germ Cell Cancer
Skakkebæk, Niels Erik, 2016, In: Hormone Research in Paediatrics. 86, 4, p. 240-246 7 p.Research output: Contribution to journal › Review › Research › peer-review
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Populations, decreasing fertility, and reproductive health
Skakkebæk, Niels Erik, Jørgensen, N., Andersson, A., Juul, Anders, Main, Katharina Maria, Jensen, T. K. & Toppari, J., 13 Apr 2019, In: Lancet Oncology. 393, 10180, p. 1500-1501 2 p.Research output: Contribution to journal › Comment/debate › Research › peer-review
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Male Reproductive Disorders and Fertility Trends: Influences of Environment and Genetic Susceptibility
Skakkebæk, Niels Erik, Rajpert-De Meyts, E., Buck Louis, G. M., Toppari, J., Andersson, A., Eisenberg, M. L., Jensen, T. K., Jørgensen, N., Swan, S. H., Sapra, K. J., Ziebe, S., Priskorn, L. & Juul, Anders, Jan 2016, In: Physiological Reviews. 96, 1, p. 55-97 43 p.Research output: Contribution to journal › Review › Research › peer-review
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Normal reference ranges for semen quality and their relations to fecundity
Skakkebæk, Niels Erik, 1 Jan 2010, In: Asian Journal of Andrology. 12, 1, p. 95-8 4 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Sperm counts, testicular cancers, and the environment
Skakkebæk, Niels Erik, 10 Oct 2017, In: B M J. 359, j4517.Research output: Contribution to journal › Editorial › Research
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Is human fecundity declining?
Skakkebæk, Niels Erik, Jørgensen, N., Main, Katharina Maria, Rajpert-De Meyts, E., Leffers, H., Andersson, A., Juul, Anders, Carlsen, E., Mortensen, G. K., Jensen, T. K. & Toppari, J., 1 Feb 2006, In: International Journal of Andrology. 29, 1, p. 2-11 10 p.Research output: Contribution to journal › Journal article › Research
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Commentary: sperm counts, data responsibility, and good scientific practice
Skakkebæk, Niels Erik, Andersson, A., Juul, Anders, Jensen, T. K., Almstrup, Kristian, Toppari, J. & Jørgensen, N., 1 Sep 2011, In: Epidemiology. 22, 5, p. 620-1 2 p.Research output: Contribution to journal › Letter › Research
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The exposure of fetuses and children to endocrine disrupting chemicals: a European Society for Paediatric Endocrinology (ESPE) and Pediatric Endocrine Society (PES) call to action statement
Skakkebæk, Niels Erik, Toppari, J., Söder, O., Gordon, C. M., Divall, S. & Draznin, M., 1 Oct 2011, In: Journal of Clinical Endocrinology and Metabolism. 96, 10, p. 3056-8 3 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Environmental factors in declining human fertility
Skakkebæk, Niels Erik, Lindahl-Jacobsen, R., Levine, H., Andersson, A., Jørgensen, N., Main, Katharina Maria, Lidegaard, Øjvind, Priskorn, Lærke, Holmboe, S. A., Bräuner, E. V., Almstrup, Kristian, Franca, L. R., Znaor, A., Kortenkamp, A., Hart, R. J. & Juul, Anders, 2022, In: Nature Reviews Endocrinology. 18, p. 139–157Research output: Contribution to journal › Review › Research › peer-review
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Association between testicular dysgenesis syndrome (TDS) and testicular neoplasia: evidence from 20 adult patients with signs of maldevelopment of the testis
Skakkebæk, Niels Erik, Holm, M., Hoei-Hansen, C., Jørgensen, N. & Rajpert-De Meyts, E., 1 Jan 2003, In: Acta Pathologica Microbiologica et Immunologica Scandinavica. 111, 1, p. 1-9; discussion 9-11Research output: Contribution to journal › Journal article › Research
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Changes in semen and the testis
Skakkebæk, Niels Erik & Keiding, N., 19 Nov 1994, In: BMJ. 309, 6965, p. 1316-1317 2 p.Research output: Contribution to journal › Editorial › Research
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Mere Testikelkræft og dårlig sædkvalitet
Skakkebæk, Niels Erik, 2008, In: Tidsskrift for Den norske lægeforening. 128, p. 554-554Research output: Contribution to journal › Journal article › Research › peer-review
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Selection Biases in Semen Study?
Skakkebæk, Niels Erik, Giwercman, A., Jensen, T. K., Carlsen, E., Jørgensen, N. & Keiding, N., Jun 1998, In: Fertility & Sterility. 69, 6, p. 1158-1159 2 p.Research output: Contribution to journal › Comment/debate › Research
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Time to pregnancy and semen parameters: a cross-sectional study among fertile couples from four European cities
Slama, R., Eustache, F., Ducot, B., Jensen, T. K., Jørgensen, N., Horte, A., Irvine, S., Suominen, J., Andersen, A. G., Auger, J., Vierula, M., Toppari, J., Andersen, A. N., Keiding, N., Skakkebæk, Niels Erik, Spira, A. & Jouannet, P., 2002, In: Human Reproduction. 17, 2, p. 503-515 13 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Is human fecundity changing? A discussion of research and data gaps precluding us from having an answer
Smarr, M. M., Sapra, K. J., Gemmill, A., Kahn, L. G., Wise, L. A., Lynch, C. D., Factor-Litvak, P., Mumford, S. L., Skakkebæk, Niels Erik, Slama, R., Lobdell, D. T., Stanford, J. B., Jensen, T. K., Boyle, E. H., Eisenberg, M. L., Turek, P. J., Sundaram, R., Thoma, M. E. & Buck Louis, G. M., 2017, In: Human Reproduction. 32, 3, p. 499-504Research output: Contribution to journal › Comment/debate › Research
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Sweat secretion rates in growth hormone disorders
Sneppen, S. B., Main, Katharina Maria, Juul, Anders, Pedersen, L. M., Kristensen, L. O., Skakkebæk, Niels Erik & Feldt-Rasmussen, Ulla, 2000, In: Clinical Endocrinology. 53, 5, p. 601-8 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Total and free insulin-like growth factor I, insulin-like growth factor binding protein 3 and acid-labile subunit reflect clinical activity in acromegaly
Sneppen, S. B., Lange, M. W., Pedersen, L. M., Kristensen L, L. Ø., Main, Katharina Maria, Juul, Anders, Skakkebæk, Niels Erik & Feldt-Rasmussen, Ulla, 2001, In: Growth Hormone & I G F Research. 11, 6, p. 384-91 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Leydig cell clustering and Reinke crystal distribution in relation to hormonal function in adult patients with testicular dysgenesis syndrome (TDS) including cryptorchidism
Soerensen, R. R., Johannsen, T. H., Skakkebæk, Niels Erik & Rajpert-De Meyts, E., Oct 2016, In: Hormones. 15, 4, p. 518-526 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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CDH1 (E-cadherin) in testicular germ cell neoplasia: suppressed translation of mRNA in pre-invasive carcinoma in situ but increased protein levels in advanced tumours
Sonne, Si Brask, Hoei-Hansen, C. E., Nielsen, J. E., Herlihy, A. S., Andersson, A., Almstrup, Kristian, Daugaard, G., Skakkebæk, Niels Erik, Leffers, H., Rajpert-De Meyts, E., Sonne, S. B., Hoei-Hansen, C. E., Nielsen, J. E., Herlihy, A. S., Andersson, A., Almstrup, K., Daugaard, G., Skakkebæk, Niels Erik, Leffers, H. & Rajpert-De Meyts, E., 2006, In: Acta Pathologica Microbiologica et Immunologica Scandinavica. 114, 7-8, p. 549-58 10 p.Research output: Contribution to journal › Journal article › Research
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Analysis of gene expression profiles of microdissected cell populations indicates that testicular carcinoma in situ is an arrested gonocyte
Sonne, Si Brask, Almstrup, Kristian, Dalgaard, M., Juncker, A. S., Edsgard, D., Ruban, L., Harrison, N. J., Schwager, C., Abdollahi, A., Huber, P. E., Brunak, Søren, Gjerdrum, L. M., Moore, H. D., Andrews, P. W., Skakkebæk, Niels Erik, Rajpert-De Meyts, E. & Leffers, H., 15 Jun 2009, In: Current Cancer Research. 69, 12, p. 5241-50 10 p.Research output: Contribution to journal › Journal article › Research
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Identity of M2A (D2-40) antigen and gp36 (Aggrus, T1A-2, podoplanin) in human developing testis, testicular carcinoma in situ and germ-cell tumours
Sonne, Si Brask, Herlihy, A. S., Hoei-Hansen, C. E., Nielsen, J. E., Almstrup, Kristian, Skakkebæk, Niels Erik, Marks, A., Leffers, H. & Rajpert-De Meyts, E., 2006, In: Virchows Archiv. 449, 2, p. 200-6 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Testicular dysgenesis syndrome and the origin of carcinoma in situ testis
Sonne, Si Brask, Kristensen, D. M., Novotny, G. W., Olesen, I. A., Nielsen, J. E., Skakkebæk, Niels Erik, Rajpert-De Meyts, E. & Leffers, H., 2008, In: International Journal of Andrology. 31, 2, p. 275-87 12 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Do environmental factors play a role in the aetiology of carcinoma in situ testis and the testicular dysgenesis syndrome?
Sonne, Si Brask, Hoei-Hansen, C. E., Fisher, J. S., Leffers, H., Rajpert-de Meyts, E. & Skakkebæk, Niels Erik, 2004, In: Verhandlungen der Deutschen Gesellschaft fur Pathologie. 88, p. 144-51 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Testicular function in young men in long-term remission after treatment for the early stages of Hodgkin's disease
Specht, Lena, Geisler, C., Hansen, M. M. & Skakkebæk, Niels Erik, 1 Oct 1984, In: Scandinavian journal of haematology. 33, 4, p. 356-62 7 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Serum sex hormone-binding globulin levels in healthy children and girls with precocious puberty before and during gonadotropin-releasing hormone agonist treatment
Sørensen, K., Andersson, A. M., Skakkebæk, Niels Erik & Juul, Anders, 2007, In: Journal of Clinical Endocrinology and Metabolism. 92, 8, p. 3189-96 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Quantification of the Leydig cell compartment in testicular biopsies and association with biochemical Leydig cell dysfunction in testicular cancer survivors
Tarsitano, M. G., Bandak, M., Jørgensen, N., Skakkebæk, Niels Erik, Juul, Anders, Lenzi, A., Daugaard, G. & Rajpert-De Meyts, E., 2018, In: Andrology. 6, 5, p. 748-755 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Hypothesis: Metformin is a potential reproductive toxicant
Tavlo, M., Skakkebæk, Niels Erik, Mathiesen, Elisabeth, Kristensen, D. M., Kjær, Kurt H., Andersson, A. & Lindahl-Jacobsen, R., 2022, In: Frontiers in Endocrinology. 13, 8 p., 1000872.Research output: Contribution to journal › Journal article › Research › peer-review
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Early puberty in internationally adopted girls: hormonal and clinical markers of puberty in 276 girls examined biannually over two years
Teilmann, Grete Katrine, Petersen, Jørgen Holm, Gormsen, M., Damgaard, K., Skakkebæk, Niels Erik, Jensen, T. K., Teilmann, Grete Katrine, Petersen, J. H., Gormsen, M., Damgaard, K., Skakkebæk, Niels Erik & Jensen, T. K., 1 Jan 2009, In: Hormone Research. 72, 4, p. 236-46 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Prevalence and incidence of precocious pubertal development in Denmark: an epidemiologic study based on national registries
Teilmann, Grete Katrine, Pedersen, C., Jensen, T. K., Skakkebæk, Niels Erik & Juul, Anders, 2005, In: Pediatrics. 116, 6, p. 1323-8 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Putative effects of endocrine disrupters on pubertal development in the human
Teilmann, Grete Katrine, Juul, Anders, Skakkebæk, Niels Erik & Toppari, J., 2002, In: Best Practice & Research: Clinical Endocrinology & Metabolism. 16, 1, p. 105-21 17 p.Research output: Contribution to journal › Journal article › Research
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Intranasal LH-RH treatment of cryptorchidism. A clinical trial and 5 years follow-up
Thorup, Jørgen Mogens, Mauritzen, K. & Skakkebæk, Niels Erik, 1987, In: European Journal of Pediatrics. 146 Suppl 2, p. S40-1Research output: Contribution to journal › Journal article › Research › peer-review
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Re: The true incidence of cryptorchidism in Denmark: D. Cortes, E. M. Kjellberg, M. Breddam and J. Thorup, J Urol 2008; 179: 314-318
Thorup, Jørgen Mogens, Cortes, Dina, Main, Katharina Maria, Skakkebæk, Niels Erik & Toppari, J., Feb 2009, In: The Journal of Urology. 181, 2, p. 922-4 3 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Prenatal pesticide exposure and PON1 genotype associated with adolescent body fat distribution evaluated by dual X-ray absorptiometry (DXA)
Tinggaard, J., Wohlfahrt-Veje, C., Husby, S., Christiansen, L., Skakkebæk, Niels Erik, Jensen, T. K., Grandjean, P., Main, Katharina Maria & Andersen, H. R., Jul 2016, In: Andrology. 4, 4, p. 735-744 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Parental Occupational Exposure to Heavy Metals and Welding Fumes and Risk of Testicular Germ Cell Tumors in Offspring: A Registry-Based Case-Control Study
Togawa, K., Le Cornet, C., Feychting, M., Tynes, T., Pukkala, E., Hansen, J., Olsson, A., Dalton, S. O., Nordby, K., Uuksulainen, S., Wiebert, P., Woldbæk, T., Skakkebæk, Niels Erik, Fervers, B. & Schüz, J., Oct 2016, In: Cancer epidemiology, biomarkers & prevention : a publication of the American Association for Cancer Research, cosponsored by the American Society of Preventive Oncology. 25, 10, p. 1426-1434 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Male reproductive health and environmental xenoestrogens
Toppari, J., Larsen, J. C., Christiansen, P., Giwercman, A., Grandjean, P., Guillette, L. J., Jégou, B., Jensen, T. K., Jouannet, P., Keiding, N., Leffers, H., McLachlan, J. A., Meyer, O., Müller, J., Rajpert-De Meyts, E., Scheike, T., Sharpe, R., Sumpter, J. & Skakkebæk, Niels Erik, 1 Aug 1996, In: Environmental Health Perspectives. 104 Suppl 4, p. 741-803 63 p.Research output: Contribution to journal › Journal article › Research
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Cryptorchidism and hypospadias as a sign of testicular dysgenesis syndrome (TDS): environmental connection
Toppari, J., Virtanen, H. E., Main, Katharina Maria & Skakkebæk, Niels Erik, 1 Oct 2010, In: Birth Defects Research. Part A: Clinical and Molecular Teratology. 88, 10, p. 910-9 10 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Possible developmental early effects of endocrine disrupters on child health
Toppari, J., Adamsson, A., Boas, M., Juul, Anders, Main, Katharina Maria, Skakkebæk, Niels Erik & Virtanen, H., 2012, WHO report 2012. p. 1-83Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Burden of disease and costs of exposure to endocrine disrupting chemicals in the European Union: an updated analysis
Trasande, L., Zoeller, R. T., Hass, U., Kortenkamp, A., Grandjean, P., Myers, J. P., DiGangi, J., Hunt, P. M., Rudel, R., Sathyanarayana, S., Bellanger, M., Hauser, R., Legler, J., Skakkebæk, Niels Erik & Heindel, J. J., Jul 2016, In: Andrology. 4, 4, p. 565-572 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Levels of persistent organic pollutants in breast milk samples representing Finnish and Danish boys with and without hypospadias
Tysman, M., Toppari, J., Main, Katharina Maria, Adamsson, A., Wohlfahrt-Veje, C., Antignac, J., Le Bizec, B., Löyttyniemi, E., Skakkebæk, Niels Erik & Virtanen, H. E., 2023, In: Chemosphere. 313, 8 p., 137343.Research output: Contribution to journal › Journal article › Research › peer-review
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Smaller genitals at school age in boys whose mothers were exposed to non-persistent pesticides in early pregnancy
Veje, C. W., Andersen, H. R., Jensen, T. K., Grandjean, P., Skakkebæk, Niels Erik & Main, Katharina Maria, 2012, In: International Journal of Andrology. 35, 3, p. 265-72 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Early breast development in girls after prenatal exposure to non-persistent pesticides
Veje, C. W., Andersen, H. R., Schmidt, I. M., Aksglaede, L., Sørensen, K., Juul, Anders, Jensen, T. K., Grandjean, P., Skakkebæk, Niels Erik & Main, Katharina Maria, 2012, In: International Journal of Andrology. 35, 3, p. 273-82Research output: Contribution to journal › Journal article › Research › peer-review
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Associations between congenital cryptorchidism in newborn boys and levels of dioxins and PCBs in placenta
Virtanen, H. E., Koskenniemi, J. J., Sundqvist, E., Main, Katharina Maria, Kiviranta, H., Tuomisto, J. T., Tuomisto, J., Viluksela, M., Vartiainen, T., Skakkebæk, Niels Erik & Toppari, J., 2012, In: International Journal of Andrology. 35, 3, p. 283-93 11 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Development and descent of the testis in relation to cryptorchidism
Virtanen, H. E., Cortes, Dina, Rajpert-De Meyts, E., Ritzén, E. M., Nordenskjöld, A., Skakkebæk, Niels Erik & Toppari, J., 1 May 2007, In: Acta Paediatrica. 96, 5, p. 622-7 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Nervous system drugs taken by future fathers and birth defects in offspring: a prospective registry-based cohort study
Wensink, M., Lu, Y., Tian, L., Jensen, T. K., Skakkebæk, Niels Erik, Lindahl-Jacobsen, R. & Eisenberg, M., 2022, In: BMJ Open. 12, 3, 8 p., e053946.Research output: Contribution to journal › Journal article › Research › peer-review
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Preconception Antidiabetic Drugs in Men and Birth Defects in Offspring: A Nationwide Cohort Study
Wensink, M. J., Lu, Y., Tian, L., Shaw, G. M., Rizzi, S., Jensen, T. K., Mathiesen, Elisabeth, Skakkebæk, Niels Erik, Lindahl-Jacobsen, R. & Eisenberg, M. L., 2022, In: Annals of Internal Medicine. 175, 5, p. 665-673 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Transcriptome analysis of the adult human Klinefelter testis and cellularity-matched controls reveals disturbed differentiation of Sertoli- and Leydig cells
Winge, S. B., Dalgaard, M. D., Belling, K. G., Jensen, J. M., Nielsen, J. E., Aksglaede, L., Schierup, M. H., Brunak, Søren, Skakkebæk, Niels Erik, Juul, Anders, Rajpert-De Meyts, E. & Almstrup, Kristian, 2018, In: Cell Death & Disease. 9, 6, 14 p., 586.Research output: Contribution to journal › Journal article › Research › peer-review
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Testicular dysgenesis syndrome: foetal origin of adult reproductive problems
Wohlfahrt-Veje, C., Main, Katharina Maria & Skakkebæk, Niels Erik, 2009, In: Clinical Endocrinology. 71, 4, p. 459-65 6 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Polychlorinated dibenzo-p-dioxins, furans, and biphenyls (PCDDs/PCDFs and PCBs) in breast milk and early childhood growth and IGF1
Wohlfahrt-Veje, C., Audouze, K., Brunak, Søren, Antignac, J. P., le Bizec, B., Juul, Anders, Skakkebæk, Niels Erik & Main, Katharina Maria, 2014, In: Reproduction. 147, 4, p. 391-399 9 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Acquired cryptorchidism is frequent in infancy and childhood
Wohlfahrt-Veje, C., Boisen, K. A., Boas, M., Damgaard, I. N., Kai, C. M., Schmidt, I. M., Chellakooty, M., Suomi, A., Toppari, J., Skakkebæk, Niels Erik & Main, Katharina Maria, 2009, In: International Journal of Andrology. 32, 4, p. 423-8 5 p.Research output: Contribution to journal › Journal article › Research › peer-review
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Pubertal Onset in Boys and Girls Is Influenced by Pubertal Timing of Both Parents
Wohlfahrt-Veje, C., Mouritsen, A., Hagen, C. P., Tinggaard, J., Mieritz, M. G., Boas, M., Petersen, Jørgen Holm, Skakkebæk, Niels Erik & Main, Katharina Maria, Jul 2016, In: The Journal of Clinical Endocrinology & Metabolism. 101, 7, p. 2667–2674 8 p.Research output: Contribution to journal › Journal article › Research › peer-review
ID: 35319116
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EDC IMPACT: Chemical UV filters can affect human sperm function in a progesterone-like manner
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Prenatal exposure to antifungal medication may change anogenital distance in male offspring: a preliminary study
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Variations in repeated serum concentrations of UV filters, phthalates, phenols and parabens during pregnancy
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