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Topic · Obstetrics and Gynecology

Pregnancy and preeclampsia studies

Pregnancy and preeclampsia studies is a research topic within Obstetrics and Gynecology. Science Explorer counts 70k research works in it since 1950. 9.9% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the pathophysiology, risk factors, diagnosis, and management of preeclampsia, including its association with placental development, hypertensive disorders, endothelial dysfunction, maternal mortality, fetal growth restriction, angiogenic factors, oxidative stress, and long-term cardiovascular health implications for both mothers and offspring.

  • Preeclampsia
  • Placental Development
  • Hypertensive Disorders
  • Endothelial Dysfunction
  • Maternal Mortality
  • Fetal Growth Restriction
  • Angiogenic Factors
  • Oxidative Stress
  • Cardiovascular Health
  • Pregnancy Complications
Research works
70k
fractional, since 1950
In the world top 10%
6.9k
per year above
Top-10% rate
9.9%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+9%
the tick is no change
Largest producer
United States
28% of the 10 largest, 2022-now
Pregnancy and preeclampsia studies

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

Which countries lead Pregnancy and preeclampsia studies research?

By volume, the United States and China publish the most (2.7k and 2.5k works in 2022-now).

By volume, 2022-now

  1. 1 United States 2.7k works
  2. 2 China 2.5k works
  3. 3 India 1.2k works
  4. 4 United Kingdom 643 works
  5. 5 Indonesia 471 works
  6. 6 Türkiye 462 works
  7. 7 Japan 421 works
  8. 8 Canada 399 works
  9. 9 Australia 373 works
  10. 10 Germany 340 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.

United States: 28.2%China: 26.6%India: 12.5%United Kingdom: 6.8%6 others listed: 25.9%28%largest
United States2,680 · 28.2%China2,532 · 26.6%India1,185 · 12.5%United Kingdom643 · 6.8%6 others listed2,465 · 25.9%

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

Which institutions lead Pregnancy and preeclampsia studies research?

By volume in 2022-now, Harvard University publishes the most Pregnancy and preeclampsia studies research, followed by Shanghai Jiao Tong University and University of Toronto.

By volume, 2022-now

  1. 1 Harvard UniversityUnited States 128 works
  2. 2 Shanghai Jiao Tong UniversityChina 87 works
  3. 3 University of TorontoCanada 80 works
  4. 4 Peking UniversityChina 76 works
  5. 5 All India Institute of Medical SciencesIndia 74 works
  6. 6 King's College LondonUnited Kingdom 72 works
  7. 7 Sichuan UniversityChina 71 works
  8. 8 Zhejiang UniversityChina 69 works
  9. 9 Nanjing Medical UniversityChina 68 works
  10. 10 Chongqing Medical UniversityChina 61 works

Who are the leading researchers in Pregnancy and preeclampsia studies?

The most-cited researchers publishing on Pregnancy and preeclampsia studies include Douglas G. Altman, Christopher J L Murray and Simon Iain Hay.

  1. 1 Douglas G. Altman United Kingdom 862k citations
  2. 2 Christopher J L Murray United States 583k citations
  3. 3 Simon Iain Hay United States 452k citations
  4. 4 George Davey Smith United Kingdom 435k citations
  5. 5 Ali H. Mokdad United States 429k citations
  6. 6 Walter Churchill Willett United States 411k citations
  7. 7 Mark J. Daly United States 403k citations
  8. 8 Robert John Tibshirani United States 396k citations
  9. 9 Zulfiqar Ahmed Bhutta Pakistan 371k citations
  10. 10 Hermann Brenner Germany 343k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in Pregnancy and preeclampsia studies?

The most cited paper in Pregnancy and preeclampsia studies is "Excess placental soluble fms-like tyrosine kinase 1 (sFlt1) may contribute to endothelial dysfunction, hypertension, and proteinuria in preeclampsia" (Sharon E. Maynard, Jiang-Yong Min, Jaime Rafael Merchan et al., 2003), with 4,020 citations. Next come "Circulating Angiogenic Factors and the Risk of Preeclampsia" (3,647) and "Fetal origins of coronary heart disease" (3,568).

Most cited papers
#PaperReleasedCitations
1 Excess placental soluble fms-like tyrosine kinase 1 (sFlt1) may contribute to endothelial dysfunction, hypertension, and proteinuria in preeclampsia Sharon E. Maynard, Jiang-Yong Min, Jaime Rafael Merchan et al. · Journal of Clinical Investigation Open access Mar 2003 4,020
2 Circulating Angiogenic Factors and the Risk of Preeclampsia Richard J. Levine, Sharon E. Maynard, Cong Qian et al. · New England Journal of Medicine Open access 11 Feb 2004 3,647
3 Fetal origins of coronary heart disease D.J.P. Barker · BMJ Open access 15 Jul 1995 3,568
4 A Reversible Posterior Leukoencephalopathy Syndrome Judy Hinchey, Claudia J Chaves, B A Appignani et al. · New England Journal of Medicine 22 Feb 1996 3,350
5 Type 2 diabetes mellitus after gestational diabetes: a systematic review and meta-analysis Leanne Bellamy, Juan-Pablo Casas, Aroon Dinesh Hingorani et al. · The Lancet Review May 2009 3,325
All 100 most cited papers, with filters and sorting

Where is Pregnancy and preeclampsia studies research done?

The largest centres of Pregnancy and preeclampsia studies research in 2022-now are Beijing (China), London (United Kingdom), Shanghai (China) and Guangzhou (China). Among places with at least 20 works in it, it is an unusually large share of all research in Jackson.

Largest cities, 2022-now

  1. 1 BeijingChina 266 works
  2. 2 LondonUnited Kingdom 257 works
  3. 3 ShanghaiChina 198 works
  4. 4 GuangzhouChina 178 works
  5. 5 IstanbulTürkiye 119 works
  6. 6 HangzhouChina 116 works
  7. 7 MoscowRussia 116 works
  8. 8 MelbourneAustralia 115 works
  9. 9 ChengduChina 114 works
  10. 10 BostonUnited States 112 works

Where it is the local speciality

  1. JacksonUS · 35.1 works19×
← less than its size predicts1×more →

Location quotient: how much more of its research is in Pregnancy and preeclampsia studies than the world average.

See Pregnancy and preeclampsia studies on the map

Where is the best place to study Pregnancy and preeclampsia studies?

Among universities, judged by research, Harvard University, King's College London and University of Cambridge score highest, combining citation excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

0%10%20%30%mean 17.86%fractional works in this field (log) →share of work in the world top 10% →University of Cambri…University of OxfordKing's College LondonHarvard University
above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Citation excellenceshare of its work in the world top 10%, 2022-now and all time averaged
40%
Specialisationhow much of its work is in this field, counted up to 10× the world share
10%
Sizeits output in this field, on a log scale
30%
Growthoutput growth, counted from -20% to +20%
10%
Internationalshare of its work with a co-author abroad
10%
Each slider sets a weight; the share it gets of the score is beside it.
#UniversityScoreTop 10%SpecialisationWorksGrowth
1Harvard UniversityUnited States 72.814.3%3.0×128 +1.9%
2King's College LondonUnited Kingdom 68.315.8%6.3×72 -5.6%
3University of CambridgeUnited Kingdom 66.723.0%2.2×36 -26.6%
4University of OxfordUnited Kingdom 64.117.4%2.0×38 -3.0%
5Shanghai Jiao Tong UniversityChina 63.814.7%2.3×87 +28.0%
6University of TorontoCanada 63.615.8%3.0×80 -28.8%
7University of OsloNorway 63.215.1%4.3×36 +34.1%
8Johns Hopkins UniversityUnited States 63.016.3%2.3×48 +16.9%
9Chinese University of Hong KongChina 62.924.8%2.3×22 +4.8%
10Wuhan UniversityChina 62.621.4%1.7×32 +23.4%

Universities only. The score blends citation excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in Pregnancy and preeclampsia studies, country by country

Is Pregnancy and preeclampsia studies research growing?

Output in 2022-2025 was 9% higher than in 2018-2021, peaking in 2023. The fastest-growing topics are Pregnancy and preeclampsia studies.

still counting19801990200020102020
grewheldshrank

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

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Pregnancy and preeclampsia studies as a percentage of every work published that year, 0.061% in 2024.

still counting0.025%0.050%0.075%Pregnancy and preeclampsia studies0.060% in 202519801990200020102020

Fractional works of Pregnancy and preeclampsia studies over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

still counting5%10%15%Pregnancy and preeclampsia studies10.1% in 2025200020102020

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

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.

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