Science Explorer Interactive view Map
Topic · Reproductive Medicine

Sperm and Testicular Function

Sperm and Testicular Function is a research topic within Reproductive Medicine. Science Explorer counts 52k research works in it since 1950. 25.0% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on male infertility, reproductive health, and the underlying factors affecting sperm quality and testicular function. It covers topics such as sperm DNA fragmentation, oxidative stress, spermatogonial stem cells, and the role of androgen receptors in spermatogenesis. Additionally, it explores trends in fertility and the impact of environmental and genetic factors on male reproductive disorders.

  • Sperm DNA Fragmentation
  • Oxidative Stress
  • Spermatogonial Stem Cells
  • Testicular Function
  • Reproductive Hormones
  • Sperm Quality
  • Germ Cell Development
  • Androgen Receptor
  • Semen Analysis
  • Fertility Trends
Research works
52k
fractional, since 1950
In the world top 10%
13k
per year above
Top-10% rate
25.0%
share of its works in the world top 10%
Growth, 2013–17 → 2018–22
+20%
the tick is no change

This ranks research output and citation impact. It says nothing about the quality of diagnosis, treatment or care.

Which countries lead Sperm and Testicular Function research?

By volume, China and the United States publish the most (1.3k and 833 works in 2022–2025).

By volume, 2022–2025

  1. 1 China 1.3k works
  2. 2 United States 833 works
  3. 3 India 423 works
  4. 4 Iran 366 works
  5. 5 Brazil 264 works
  6. 6 Türkiye 253 works
  7. 7 Japan 230 works
  8. 8 Italy 226 works
  9. 9 Spain 218 works
  10. 10 Egypt 193 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

China: 30.4%United States: 19.3%India: 9.8%Iran: 8.5%6 others listed: 32.0%30%largest
China1,314 · 30.4%United States833 · 19.3%India423 · 9.8%Iran366 · 8.5%6 others listed1,384 · 32.0%

Shares of the rows listed above, not of the whole node.

Which institutions lead Sperm and Testicular Function research?

By volume in 2022–2025, Cairo University publishes the most Sperm and Testicular Function research, followed by Cornell University and Universidade Estadual Paulista (Unesp).

By volume, 2022–2025

  1. 1 Cairo UniversityEgypt 35 works
  2. 2 Cornell UniversityUnited States 30 works
  3. 3 Universidade Estadual Paulista (Unesp)Brazil 24 works
  4. 4 National Dairy Research InstituteIndia 23 works
  5. 5 Nanjing Medical UniversityChina 22 works
  6. 6 Airlangga UniversityIndonesia 20 works
  7. 7 Academic Center for Education, Culture and ResearchIran 18 works
  8. 8 Sun Yat-sen UniversityChina 17 works
  9. 9 Northwest A&F UniversityChina 17 works
  10. 10 University of TehranIran 17 works

Where is Sperm and Testicular Function research done?

The largest centres of Sperm and Testicular Function research in 2022–2025 are Beijing (China), Tehran (Iran), Guangzhou (China) and Nanjing (China). Among places with at least 20 works in it, it is an unusually large share of all research in Karnāl.

Largest cities, 2022–2025

  1. 1 Beijing China 152 works
  2. 2 Tehran Iran 142 works
  3. 3 Guangzhou China 91 works
  4. 4 Nanjing China 73 works
  5. 5 Shanghai China 69 works
  6. 6 São Paulo Brazil 62 works
  7. 7 Wuhan China 59 works
  8. 8 New York United States 57 works
  9. 9 Tokyo Japan 55 works
  10. 10 Moscow Russia 55 works

Where it is the local speciality

  1. KarnālIN · 23.9 works38×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Sperm and Testicular Function than the world average.

See Sperm and Testicular Function on the map

Where is the best place to study Sperm and Testicular Function?

Among universities, judged by research, Slovak University of Agriculture in Nitra, University of Newcastle Australia and Universitat de Girona score highest, combining excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

0%20%40%mean 29.53%fractional works in this node (log) →share in the world top 10% →Slovak University of Agriculture in Nitra: 15, 27.6%University of Newcastle Australia: 15, 37.4%Universitat de Girona: 10, 39.4%Cairo University: 35, 25.5%Urmia University: 14, 20.8%Weill Cornell Medicine: 16, 20.3%Yangzhou University: 15, 37.3%Swedish University of Agricultural Sciences: 12, 24.2%Qingdao Agricultural University: 9, 34.8%Wrocław University of Environmental and Life Sciences: 9, 28.0%Universitat de GironaUniversity of Newcas…Slovak University of…Cairo University
above the meannear itbelow it

One dot per university in the table below. The upper left is the interesting corner: small places doing unusually strong work.

#UniversityScoreTop 10%SpecialisationWorksGrowth
1 Slovak University of Agriculture in NitraSlovakia 70.527.6%44.8×15 +154.6%
2 University of Newcastle AustraliaAustralia 69.837.4%10.5×15 -0.6%
3 Universitat de GironaSpain 65.339.4%12.1×10 +39.6%
4 Cairo UniversityEgypt 62.525.5%6.8×35 +17.0%
5 Urmia UniversityIran 59.020.8%13.8×14 +100.8%
6 Weill Cornell MedicineUnited States 58.720.3%18.3×16 —
7 Yangzhou UniversityChina 58.337.3%4.1×15 +156.6%
8 Swedish University of Agricultural SciencesSweden 58.324.2%11.4×12 -20.5%
9 Qingdao Agricultural UniversityChina 57.234.8%9.8×9 +45.6%
10 Wrocław University of Environmental and Life SciencesPoland 56.928.0%19.0×9 +62.9%

Universities only. Score blends excellence (30%), specialisation (25%), size (20%), growth (15%) and international reach (10%), 2015–2022; growth compares 2010–14 with 2015–19.

Is Sperm and Testicular Function research growing?

Output in 2018–2022 was 20% higher than in 2013–2017, peaking in 2025. The fastest-growing topics are Sperm and Testicular Function.

19801990200020102020
grewheldshrank

The same series as a ribbon — one cell per year, darker for more. The line above answers how much; this answers when.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.