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Topic · Obstetrics and Gynecology

COVID-19 Impact on Reproduction

COVID-19 Impact on Reproduction is a research topic within Obstetrics and Gynecology. Science Explorer counts 16k research works in it since 1951. 10.1% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the impact of COVID-19 infection on pregnancy outcomes, including maternal and perinatal effects, vertical transmission of SARS-CoV-2, vaccination in pregnancy, and placental pathology. It covers clinical characteristics, risk assessment, and potential maternal and infant outcomes associated with COVID-19 infection during pregnancy.

  • COVID-19
  • Pregnancy
  • Vertical Transmission
  • Maternal Outcomes
  • Perinatal Outcomes
  • SARS-CoV-2
  • Neonatal Infection
  • Vaccination in Pregnancy
  • Placental Pathology
  • Maternal Mortality
Research works
16k
fractional, since 1951
In the world top 10%
1.7k
per year above
Top-10% rate
10.1%
share of its works in the world top 10%
Growth, 2018-21 → 2022-25
+43%
the tick is no change
Largest producer
United States
33% of the 10 largest, 2022-now
COVID-19 Impact on Reproduction

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

Which countries lead COVID-19 Impact on Reproduction research?

By volume, the United States and India publish the most (1.7k and 544 works in 2022-now).

By volume, 2022-now

  1. 1 United States 1.7k works
  2. 2 India 544 works
  3. 3 Brazil 532 works
  4. 4 China 482 works
  5. 5 Indonesia 398 works
  6. 6 Türkiye 343 works
  7. 7 United Kingdom 331 works
  8. 8 Italy 274 works
  9. 9 Iran 270 works
  10. 10 Canada 216 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: 32.9%India: 10.8%Brazil: 10.5%China: 9.5%6 others listed: 36.3%33%largest
United States1,660 · 32.9%India544 · 10.8%Brazil532 · 10.5%China482 · 9.5%6 others listed1,832 · 36.3%

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

Which institutions lead COVID-19 Impact on Reproduction research?

By volume in 2022-now, University of North Carolina at Chapel Hill publishes the most COVID-19 Impact on Reproduction research, followed by Harvard University and Johns Hopkins University.

By volume, 2022-now

  1. 1 University of North Carolina at Chapel HillUnited States 74 works
  2. 2 Harvard UniversityUnited States 57 works
  3. 3 Johns Hopkins UniversityUnited States 50 works
  4. 4 All India Institute of Medical SciencesIndia 42 works
  5. 5 Sağlık Bilimleri ÜniversitesiTürkiye 36 works
  6. 6 United States Department of Health and Human ServicesUnited States 36 works
  7. 7 Airlangga UniversityIndonesia 36 works
  8. 8 Universidade de São PauloBrazil 35 works
  9. 9 Tehran University of Medical SciencesIran 29 works
  10. 10 University of TorontoCanada 28 works

Who are the leading researchers in COVID-19 Impact on Reproduction?

The most-cited researchers publishing on COVID-19 Impact on Reproduction include Christopher J L Murray, Ali H. Mokdad and Zulfiqar Ahmed Bhutta.

  1. 1 Christopher J L Murray United States 583k citations
  2. 2 Ali H. Mokdad United States 429k citations
  3. 3 Zulfiqar Ahmed Bhutta Pakistan 371k citations
  4. 4 Giuseppe Remuzzi Italy 328k citations
  5. 5 Mika Kivimäki United Kingdom 318k citations
  6. 6 Dan J. Stein South Africa 306k citations
  7. 7 Sadaf Ghajarieh Sepanlou Iran 282k citations
  8. 8 Rakhi Dandona United States 280k 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 COVID-19 Impact on Reproduction?

The most cited paper in COVID-19 Impact on Reproduction is "Early Transmission Dynamics in Wuhan, China, of Novel Coronavirus–Infected Pneumonia" (Qun Li et al., 2020), with 18,005 citations. Next come "Clinical characteristics and intrauterine vertical transmission potential of COVID-19 infection in nine pregnant women: a retrospective review of medical records" (4,059) and "The reproductive number of COVID-19 is higher compared to SARS coronavirus" (3,494).

Most cited papers
#PaperReleasedCitations
1 Early Transmission Dynamics in Wuhan, China, of Novel Coronavirus–Infected Pneumonia Qun Li et al. · New England Journal of Medicine Open access 29 Jan 2020 18,005
2 Clinical characteristics and intrauterine vertical transmission potential of COVID-19 infection in nine pregnant women: a retrospective review of medical records Huijun Chen, Juanjuan Guo, Chen Wang et al. · The Lancet Open access 12 Feb 2020 4,059
3 The reproductive number of COVID-19 is higher compared to SARS coronavirus Ying Liu, Alberto Alexander Gayle, Annelies Wilder‐Smith et al. · Journal of Travel Medicine Open access 11 Feb 2020 3,494
4 Multisystem Inflammatory Syndrome in U.S. Children and Adolescents Leora R. Feldstein et al. · New England Journal of Medicine Open access 29 Jun 2020 2,718
5 Systematic review of COVID‐19 in children shows milder cases and a better prognosis than adults Jonas Filip Ludvigsson · Acta Paediatrica ReviewOpen access 23 Mar 2020 2,442
All 100 most cited papers, with filters and sorting

Where is COVID-19 Impact on Reproduction research done?

The largest centres of COVID-19 Impact on Reproduction research in 2022-now are London (United Kingdom), Istanbul (Türkiye), São Paulo (Brazil) and New York (United States).

Largest cities, 2022-now

  1. 1 LondonUnited Kingdom 132 works
  2. 2 IstanbulTürkiye 101 works
  3. 3 São PauloBrazil 97 works
  4. 4 New YorkUnited States 97 works
  5. 5 TehranIran 84 works
  6. 6 New DelhiIndia 76 works
  7. 7 Chapel HillUnited States 73 works
  8. 8 BeijingChina 63 works
  9. 9 BaltimoreUnited States 61 works
  10. 10 Rio de JaneiroBrazil 57 works
See COVID-19 Impact on Reproduction on the map

Where is the best place to study COVID-19 Impact on Reproduction?

Among universities, judged by research, Radboud University Nijmegen, Johns Hopkins University and London School of Hygiene & Tropical Medicine 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%20%40%mean 20.89%fractional works in this field (log) →share of work in the world top 10% →Radboud University N…London School of Hyg…Harvard UniversityJohns Hopkins Univer…
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
1Radboud University NijmegenNetherlands 62.845.9%2.1×9 +23.2%
2Johns Hopkins UniversityUnited States 61.516.6%4.4×50 +46.8%
3London School of Hygiene & Tropical MedicineUnited Kingdom 59.319.7%16.0×18 +86.2%
4Harvard UniversityUnited States 58.518.9%2.5×57 -3.4%
5University of GondarEthiopia 55.026.1%16.0×17 +194.2%
6University of North Carolina at Chapel HillUnited States 53.73.6%5.7×74 +420.7%
7University of TorontoCanada 52.221.1%1.9×28 +10.8%
8Karolinska InstitutetSweden 50.817.4%4.0×17 +67.2%
9Tel Aviv UniversityIsrael 49.415.7%3.6×21 +33.7%
10University of CalgaryCanada 48.323.9%2.4×12 +98.5%

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 COVID-19 Impact on Reproduction, country by country

Is COVID-19 Impact on Reproduction research growing?

Output in 2022-2025 was 43% higher than in 2018-2021, peaking in 2022. The fastest-growing topics are COVID-19 Impact on Reproduction.

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 COVID-19 Impact on Reproduction as a percentage of every work published that year, 0.028% in 2024.

still counting0.020%0.040%0.060%COVID-19 Impact on Reproduction0.021% in 202519801990200020102020

Fractional works of COVID-19 Impact on Reproduction 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%COVID-19 Impact on Reproduction10.3% 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.

Discussion

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