Niels E. Skakkebæk

65.9k total citations · 16 hit papers
599 papers, 46.6k citations indexed

About

Niels E. Skakkebæk is a scholar working on Reproductive Medicine, Surgery and Molecular Biology. According to data from OpenAlex, Niels E. Skakkebæk has authored 599 papers receiving a total of 46.6k indexed citations (citations by other indexed papers that have themselves been cited), including 257 papers in Reproductive Medicine, 200 papers in Surgery and 196 papers in Molecular Biology. Recurrent topics in Niels E. Skakkebæk's work include Sperm and Testicular Function (202 papers), Testicular diseases and treatments (185 papers) and Sexual Differentiation and Disorders (149 papers). Niels E. Skakkebæk is often cited by papers focused on Sperm and Testicular Function (202 papers), Testicular diseases and treatments (185 papers) and Sexual Differentiation and Disorders (149 papers). Niels E. Skakkebæk collaborates with scholars based in Denmark, Finland and United States. Niels E. Skakkebæk's co-authors include Anders Juul, Anna‐Maria Andersson, Aleksander Giwercman, Katharina M. Main, Ewa Rajpert‐De Meyts, Jorma Toppari, Niels Jørgensen, Richard M. Sharpe, Tina Kold Jensen and Elisabeth Carlsen and has published in prestigious journals such as Nature, Science and New England Journal of Medicine.

In The Last Decade

Niels E. Skakkebæk

593 papers receiving 45.0k citations

Hit Papers

Evidence for decreasing quality of semen during past 50 y... 1989 2026 2001 2013 1992 1993 2003 2012 1989 500 1000 1.5k 2.0k
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Evidence for decreasing quality of semen during past 50 years.
    1992 2.0k citations Elisabeth Carlsen, Niels Keiding et al. BMJ profile →
  2. Are oestrogens involved in falling sperm counts and disorders of the male reproductive tract?
    1993 1.5k citations Richard M. Sharpe, Niels E. Skakkebæk The Lancet profile →
  3. The Timing of Normal Puberty and the Age Limits of Sexual Precocity: Variations around the World, Secular Trends, and Changes after Migration
    2003 1.2k citations Anders Juul, Niels E. Skakkebæk et al. profile →
  4. Endocrine-Disrupting Chemicals and Public Health Protection: A Statement of Principles from The Endocrine Society
    2012 809 citations Niels E. Skakkebæk et al. profile →
  5. BENEFICIAL EFFECTS OF GROWTH HORMONE TREATMENT IN GH-DEFICIENT ADULTS
    1989 726 citations Niels E. Skakkebæk et al. The Lancet profile →
  6. Male Reproductive Disorders and Fertility Trends: Influences of Environment and Genetic Susceptibility
    2015 662 citations Niels E. Skakkebæk, Ewa Rajpert‐De Meyts et al. profile →
  7. WHO Classification of of Tumours of the Urinary System and Male Genital Organs
    2016 587 citations Ewa Rajpert‐De Meyts, Niels E. Skakkebæk et al. profile →
  8. Relation between semen quality and fertility: a population-based study of 430 first-pregnancy planners
    1998 586 citations Tina Kold Jensen, Niels E. Skakkebæk et al. The Lancet profile →
  9. Plasma Leptin Levels in Healthy Children and Adolescents: Dependence on Body Mass Index, Body Fat Mass, Gender, Pubertal Stage, and Testosterone*
    1997 561 citations Anders Juul, Niels E. Skakkebæk et al. The Journal of Clinical Endocrinology & Metabolism profile →
  10. Body mass index in relation to semen quality and reproductive hormonesamong 1,558 Danish men
    2004 560 citations Tina Kold Jensen, Anna‐Maria Andersson et al. Fertility and Sterility profile →
  11. Human Breast Milk Contamination with Phthalates and Alterations of Endogenous Reproductive Hormones in Infants Three Months of Age
    2005 532 citations Katharina M. Main, Marko Kaleva et al. Environmental Health Perspectives profile →
  12. Metabolism of phthalates in humans
    2007 503 citations Hanne Frederiksen, Niels E. Skakkebæk et al. Molecular Nutrition & Food Research profile →
  13. Recent Decline in Age at Breast Development: The Copenhagen Puberty Study
    2009 476 citations Lise Aksglæde, Jørgen Holm Petersen et al. profile →
  14. Sunscreens: are they beneficial for health? An overview of endocrine disrupting properties of UV‐filters
    2012 353 citations Hanne Frederiksen, Niels E. Skakkebæk et al. International Journal of Andrology profile →
  15. Environmental factors in declining human fertility
    2021 207 citations Niels E. Skakkebæk, Rune Lindahl‐Jacobsen et al. profile →
  16. Paracetamol use during pregnancy — a call for precautionary action
    2021 117 citations Niels E. Skakkebæk, David M. Kristensen et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Niels E. Skakkebæk Denmark 114 16.4k 12.7k 12.0k 8.9k 7.9k 599 46.6k
Jorma Toppari Finland 82 7.9k 0.5× 7.3k 0.6× 6.5k 0.5× 5.0k 0.6× 5.0k 0.6× 522 27.1k
Richard M. Sharpe United Kingdom 82 10.1k 0.6× 6.3k 0.5× 7.1k 0.6× 2.5k 0.3× 4.4k 0.6× 304 22.9k
Aleksander Giwercman Sweden 73 10.5k 0.6× 5.4k 0.4× 4.6k 0.4× 3.7k 0.4× 5.3k 0.7× 375 22.9k
Anders Juul Denmark 90 8.8k 0.5× 8.3k 0.7× 3.6k 0.3× 2.0k 0.2× 5.0k 0.6× 655 29.8k
Ashok Agarwal United States 121 37.3k 2.3× 8.8k 0.7× 2.7k 0.2× 3.3k 0.4× 26.5k 3.4× 981 55.8k
Katharina M. Main Denmark 74 4.3k 0.3× 5.0k 0.4× 6.9k 0.6× 2.5k 0.3× 2.8k 0.4× 294 18.5k
C. Yan Cheng United States 87 14.5k 0.9× 9.0k 0.7× 2.4k 0.2× 2.3k 0.3× 7.0k 0.9× 487 25.0k
Kenneth S. Korach United States 113 9.8k 0.6× 12.9k 1.0× 5.0k 0.4× 1.8k 0.2× 4.6k 0.6× 449 44.7k
Linda C. Giudice United States 94 19.2k 1.2× 4.9k 0.4× 3.8k 0.3× 1.3k 0.1× 7.2k 0.9× 360 35.3k
Michael K. Skinner United States 88 6.8k 0.4× 13.6k 1.1× 4.3k 0.4× 1.4k 0.2× 6.0k 0.8× 327 27.1k

Countries citing papers authored by Niels E. Skakkebæk

Since Specialization
Citations

This map shows the geographic impact of Niels E. Skakkebæk's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Niels E. Skakkebæk with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Niels E. Skakkebæk more than expected).

Fields of papers citing papers by Niels E. Skakkebæk

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Niels E. Skakkebæk. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Niels E. Skakkebæk. The network helps show where Niels E. Skakkebæk may publish in the future.

Co-authorship network of co-authors of Niels E. Skakkebæk

This figure shows the co-authorship network connecting the top 25 collaborators of Niels E. Skakkebæk. A scholar is included among the top collaborators of Niels E. Skakkebæk based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Niels E. Skakkebæk. Niels E. Skakkebæk is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Uldbjerg, Cecilie S., Panu Rantakokko, Youn‐Hee Lim, et al.. (2025). Prenatal exposure to organochlorine pesticides and polychlorinated biphenyls and risk of testicular germ cell cancer later in life. The Science of The Total Environment. 970. 179054–179054. 5 indexed citations
2.
Hjelmborg, Jacob, et al.. (2025). Smoking and testicular cancer: A Danish nationwide cohort study. Cancer Epidemiology. 95. 102746–102746.
3.
Uldbjerg, Cecilie S., Youn‐Hee Lim, Jørgen Holm Petersen, et al.. (2025). Exposure to per- and polyfluoroalkyl substances during fetal development and risk of testicular germ cell cancer in adulthood. Environment International. 203. 109762–109762. 1 indexed citations
4.
Winge, Sofia Boeg, Niels E. Skakkebæk, Lise Aksglæde, et al.. (2024). X‑chromosome loss rescues Sertoli cell maturation and spermatogenesis in Klinefelter syndrome. Cell Death and Disease. 15(6). 396–396. 4 indexed citations
5.
Rehfeld, Anders, Anna‐Maria Andersson, & Niels E. Skakkebæk. (2020). Bisphenol A Diglycidyl Ether (BADGE) and Bisphenol Analogs, but Not Bisphenol A (BPA), Activate the CatSper Ca2+ Channel in Human Sperm. Frontiers in Endocrinology. 11. 324–324. 30 indexed citations
6.
Koskenniemi, Jaakko J., Helena E. Virtanen, Christine Wohlfahrt‐Veje, et al.. (2018). Postnatal Changes in Testicular Position Are Associated With IGF-I and Function of Sertoli and Leydig Cells. The Journal of Clinical Endocrinology & Metabolism. 103(4). 1429–1437. 25 indexed citations
7.
Hart, Roger, Hanne Frederiksen, Dorota A. Doherty, et al.. (2018). The Possible Impact of Antenatal Exposure to Ubiquitous Phthalates Upon Male Reproductive Function at 20 Years of Age. Frontiers in Endocrinology. 9. 288–288. 41 indexed citations
8.
Bang, Anne Kirstine, Alexander S. Busch, Kristian Almstrup, et al.. (2017). Is the FSHR 2039A>G variant associated with susceptibility to testicular germ cell cancer?. Andrology. 6(1). 176–183. 6 indexed citations
9.
Togawa, Kayo, Charlotte Le Cornet, Maria Feychting, et al.. (2016). Parental Occupational Exposure to Heavy Metals and Welding Fumes and Risk of Testicular Germ Cell Tumors in Offspring: A Registry-Based Case–Control Study. Cancer Epidemiology Biomarkers & Prevention. 25(10). 1426–1434. 20 indexed citations
10.
Joensen, Ulla Nordström, Niels Jørgensen, Michael Meldgaard, et al.. (2014). Associations of Filaggrin Gene Loss-of-Function Variants with Urinary Phthalate Metabolites and Testicular Function in Young Danish Men. Environmental Health Perspectives. 122(4). 345–350. 20 indexed citations
11.
Virtanen, Helena E., Jaakko J. Koskenniemi, Katharina M. Main, et al.. (2011). Associations between congenital cryptorchidism in newborn boys and levels of dioxins and PCBs in placenta. International Journal of Andrology. 35(3). 283–293. 42 indexed citations
12.
Sonne, Si Brask, Kristian Almstrup, Marlene Dalgaard, et al.. (2009). Analysis of Gene Expression Profiles of Microdissected Cell Populations Indicates that Testicular Carcinoma In situ Is an Arrested Gonocyte. Cancer Research. 69(12). 5241–5250. 141 indexed citations
13.
Frederiksen, Hanne, Niels E. Skakkebæk, & Anna‐Maria Andersson. (2007). Metabolism of phthalates in humans. Molecular Nutrition & Food Research. 51(7). 899–911. 503 indexed citations breakdown →
14.
Aksglæde, Lise, Anders Juul, Henrik Leffers, Niels E. Skakkebæk, & Anna‐Maria Andersson. (2006). The sensitivity of the child to sex steroids: possible impact of exogenous estrogens. Human Reproduction Update. 12(4). 341–349. 109 indexed citations
15.
Boisen, Kirsten A., Marla Chellakooty, Ida Maria Schmidt, et al.. (2005). Hypospadias in a Cohort of 1072 Danish Newborn Boys: Prevalence and Relationship to Placental Weight, Anthropometrical Measurements at Birth, and Reproductive Hormone Levels at Three Months of Age. The Journal of Clinical Endocrinology & Metabolism. 90(7). 4041–4046. 156 indexed citations
16.
Kaleva, Marko, Helena E. Virtanen, Anne‐Maarit Haavisto, et al.. (2005). Circannual rhythm in the incidence of cryptorchidism in Finland. International Journal of Andrology. 28(1). 53–57. 17 indexed citations
17.
Almstrup, Kristian, Christina Engel Hoei‐Hansen, Ute Wirkner, et al.. (2004). Embryonic Stem Cell-Like Features of Testicular Carcinoma in Situ Revealed by Genome-Wide Gene Expression Profiling. Cancer Research. 64(14). 4736–4743. 192 indexed citations
18.
Jensen, Tina Kold, Anna‐Maria Andersson, Niels Jørgensen, et al.. (2004). Reduced Semen Quality among Under- and Overweight Men.: A study of 1558 young men from the general population.. Fertility and Sterility. 82. 1 indexed citations
19.
Keiding, Niels, A. Giwercman, Elisabeth Carlsen, & Niels E. Skakkebæk. (1994). Commentary: Importance of empirical evidence. BMJ. 309(6946). 22.1–22.1. 9 indexed citations
20.
Sharpe, Richard M. & Niels E. Skakkebæk. (1993). Are oestrogens involved in falling sperm counts and disorders of the male reproductive tract?. The Lancet. 341(8857). 1392–1396. 1464 indexed citations breakdown →

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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