World's Best Scientists 2026 revealed!

D-Index & Metrics

Medicine

D-Index
100
Citations
31799
World Ranking
8352
National Ranking
96

Overview

Niels Jørgensen is affiliated with the University of Copenhagen in Denmark. Their research primarily spans the fields of Medicine and Biochemistry, Genetics and Molecular Biology, with a strong focus on subfields such as Reproductive Medicine, Endocrinology, Diabetes and Metabolism, and Molecular Biology. Additional areas of specialization include Public Health, Environmental and Occupational Health, and Surgery.

Their work covers several main topics related to reproductive health and biology, including:

  • Sexual Differentiation and Disorders
  • Sperm and Testicular Function
  • Hormonal and reproductive studies
  • Reproductive Biology and Fertility
  • Ovarian function and disorders
  • Testicular diseases and treatments
  • Reproductive Health and Technologies

Jørgensen has published extensively, with frequent contributions to journals such as Human Reproduction, Andrology, Journal of the Endocrine Society, The Journal of Clinical Endocrinology & Metabolism, and Fertility and Sterility.

Some recent notable papers include:

  • "Temporal trends in sperm count: a systematic review and meta-regression analysis of samples collected globally in the 20th and 21st centuries" (2022), published in Human Reproduction Update
  • "Environmental factors in declining human fertility" (2021), published in Nature Reviews Endocrinology
  • "A de novo paradigm for male infertility" (2022), published in Nature Communications
  • "Diverse monogenic subforms of human spermatogenic failure" (2022), published in Nature Communications
  • "Standards in semen examination: publishing reproducible and reliable data based on high-quality methodology" (2022), published in Human Reproduction

Frequent collaborators with Jørgensen include Anders Juul, Lærke Priskorn, Martin Blomberg Jensen, Anna-Maria Andersson, and Jørgen Holm Petersen.

Best Publications

  • Temporal trends in sperm count: a systematic review and meta-regression analysis.

    Hagai Levine;Niels Jørgensen;Anderson Martino-Andrade;Jaime Mendiola

  • Body mass index in relation to semen quality and reproductive hormones among 1,558 Danish men.

    Tina Kold Jensen;Anne-Maria Andersson;Niels Jørgensen;Anne-Grethe Andersen

  • Male Reproductive Disorders and Fertility Trends: Influences of Environment and Genetic Susceptibility

    Niels E Skakkebaek;Ewa Rajpert-De Meyts;Germaine M Buck Louis;Jorma Toppari

  • Regional differences in semen quality in Europe.

    Niels Jørgensen;Anne-Grethe Andersen;Florence Eustache;D. Stewart Irvine

  • Expression of anti-müllerian hormone during normal and pathological gonadal development : Association with differentiation of Sertoli and granulosa cells

    Ewa Rajpert-De Meyts;Niels Jørgensen;Niels Græm;Jørn Müller

  • Obesity and Bariatric Surgery Drive Epigenetic Variation of Spermatozoa in Humans.

    Ida Donkin;Soetkin Versteyhe;Lars R. Ingerslev;Kui Qian

  • Do perfluoroalkyl compounds impair human semen quality

    Ulla Nordström Joensen;Rossana Bossi;Henrik Leffers;Allan Astrup Jensen

  • High frequency of sub-optimal semen quality in an unselected population of young men

    A G Andersen;Tina Kold Jensen;E Carlsen;N Jørgensen

  • Nordic consensus on treatment of undescended testes

    E Martin Ritzén;Anders Bergh;R Bjerknes;P Christiansen

  • Vitamin D receptor and vitamin D metabolizing enzymes are expressed in the human male reproductive tract

    Martin Blomberg Jensen;John E Nielsen;Anne Jørgensen;Ewa Rajpert-De Meyts

  • Is human fecundity declining

    Niels E Skakkebaek;Niels Jørgensen;Katharina M Main;Ewa Rajpert-De Meyts

  • East–West gradient in semen quality in the Nordic–Baltic area: a study of men from the general population in Denmark, Norway, Estonia and Finland

    Niels Jørgensen;Elisabeth Carlsen;Ingrid Nermoen;Margus Punab

  • Time to pregnancy and semen parameters: a cross-sectional study among fertile couples from four European cities

    R. Slama;F. Eustache;B. Ducot;T.K. Jensen

  • Association of In Utero Exposure to Maternal Smoking with Reduced Semen Quality and Testis Size in Adulthood: A Cross-Sectional Study of 1,770 Young Men from the General Population in Five European Countries

    Tina Kold Jensen;Niels Jørgensen;Margus Punab;Trine B. Haugen

  • Human semen quality in the new millennium: a prospective cross-sectional population-based study of 4867 men

    Niels Jørgensen;Ulla Nordström Joensen;Tina Kold Jensen;Martin Blomberg Jensen

  • Cryptorchidism: classification, prevalence and long‐term consequences

    Helena E Virtanen;Robert Bjerknes;Dina Cortes;Niels Jørgensen

  • Impaired Leydig Cell Function in Infertile Men: A Study of 357 Idiopathic Infertile Men and 318 Proven Fertile Controls

    A.-M. Andersson;N. Jørgensen;L. Frydelund-Larsen;E. Rajpert-De Meyts

  • Effects of Viruses on Nutrient Turnover and Growth Efficiency of Noninfected Marine Bacterioplankton

    M. Middelboe;N. O. G. Jørgensen;N. Kroer

  • Vitamin D is positively associated with sperm motility and increases intracellular calcium in human spermatozoa

    Martin Blomberg Jensen;Poul J. Bjerrum;Torben E. Jessen;John E. Nielsen

  • Germ cell cancer and disorders of spermatogenesis: An environmental connection?

    Niels E. Skakkebék;Ewa Rajpert-De Meyts;Niels Jørgensen;Elisabeth Carlsen

Frequent Co-Authors

Niels E. Skakkebæk
Niels E. Skakkebæk University of Copenhagen
Tina Kold Jensen
Tina Kold Jensen University of Southern Denmark
Anders Juul
Anders Juul University of Copenhagen
Anna-Maria Andersson
Anna-Maria Andersson University of Copenhagen
Jørgen Holm Petersen
Jørgen Holm Petersen University of Copenhagen
Jorma Toppari
Jorma Toppari University of Turku
Ewa Rajpert-De Meyts
Ewa Rajpert-De Meyts University of Copenhagen
Jorge E. Chavarro
Jorge E. Chavarro Harvard University
Katharina M. Main
Katharina M. Main University of Copenhagen
Shanna H. Swan
Shanna H. Swan Icahn School of Medicine at Mount Sinai

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