John O’Brien
- Obstetrics and Gynecology top 0.2%
- Pregnancy and preeclampsia studies 15
- Gestational Diabetes Research and Management 11
- Maternal and Perinatal Health Interventions 11
-
- Maternal and fetal healthcare 11
- Birth, Development, and Health 9
-
- Pregnancy-related medical research 18
- Epidemiology top 2%
- Preterm Birth and Chorioamnionitis 27
- Microbiology top 10%
-
- Reproductive System and Pregnancy 4
- Co-authors
- J R BartonElvis S. DonaldsonGeorge W. CreasyElçin ÇetingözSonia S. HassanRoberto RomeroK. H. NicolaidesEduardo Da Fonseca
- Cited by
- Obstetrics and GynecologyPediatrics, Perinatology and Child HealthPublic Health, Environmental and Occupational Health
- Journals
- American Journal of Obstetrics and Gynecology (39 papers)American Journal of Perinatology (6 papers)Ultrasound in Obstetrics and Gynecology (6 papers)
- Partner nations
- United StatesUnited KingdomSouth Africa
In The Last Decade
John O’Brien
81 papers receiving 2.7k citations
Hit Papers
Peers
Comparison fields: 5 of 141
- Obstetrics and Gynecology 1.4k
- Pediatrics, Perinatology and Child Health 1.1k
- Public Health, Environmental and Occupational Health 1.4k
- Epidemiology 1.2k
- Microbiology 52
Countries citing papers authored by John O’Brien
This map shows the geographic impact of John O’Brien'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 John O’Brien with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John O’Brien more than expected).
Fields of papers citing papers by John O’Brien
This network shows the impact of papers produced by John O’Brien. 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 John O’Brien. The network helps show where John O’Brien may publish in the future.
Co-authorship network
The 25 scholars most cited alongside John O’Brien, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
| # | Work | ||
|---|---|---|---|
| 1 | 2025 | 0 | |
| 2 | 2023 | 3 | |
| 3 | 2018 | 0 | |
| 4 | 2018 | 4 | |
| 5 | 2012 | 114 | |
| 6 | 2011 | 5 | |
| 7 | Vaginal progesterone in women with an asymptomatic sonographic short cervix in the midtrimester decreases preterm delivery and neonatal morbidity: a systematic review and metaanalysis of individual patient databreakdown → | 2011 | 395 |
| 8 | 2010 | 23 | |
| 9 | Progestins for the prevention of spontaneous preterm birth: review and implications of recent studies. | 2009 | 8 |
| 10 | 2009 | 8 | |
| 11 | 2005 | 17 | |
| 12 | 2004 | 4 | |
| 13 | 2002 | 18 | |
| 14 | 2002 | 29 | |
| 15 | Food microorganisms: Health benefits, safety evaluation and strains with documented history of use in foods | 2002 | 44 |
| 16 | 2001 | 6 | |
| 17 | 1995 | 3 | |
| 18 | 1995 | 29 | |
| 19 | 1984 | 6 | |
| 20 | 1972 | 1 |
About John O’Brien
John O’Brien is a scholar working on Obstetrics and Gynecology, Pediatrics, Perinatology and Child Health, Public Health, Environmental and Occupational Health, Epidemiology and Urology, having authored 91 papers that have together received 2.8k indexed citations. Recurring topics across this work include Preterm Birth and Chorioamnionitis (27 papers), Pregnancy-related medical research (18 papers), Pregnancy and preeclampsia studies (15 papers), Maternal and fetal healthcare (11 papers), Gestational Diabetes Research and Management (11 papers), Maternal and Perinatal Health Interventions (11 papers), Birth, Development, and Health (9 papers) and Reproductive System and Pregnancy (4 papers). The work is most often cited by research in Obstetrics and Gynecology (1.4k citations), Pediatrics, Perinatology and Child Health (1.1k citations), Public Health, Environmental and Occupational Health (1.4k citations), Epidemiology (1.2k citations) and Microbiology (52 citations). John O’Brien has collaborated with scholars based in United States, United Kingdom and South Africa. Frequent co-authors include J R Barton, Elvis S. Donaldson, George W. Creasy, Elçin Çetingöz, Sonia S. Hassan, Roberto Romero, K. H. Nicolaides, Eduardo Da Fonseca, John R. Barton and Agustín Conde‐Agudelo. Their work appears in journals such as American Journal of Obstetrics and Gynecology, American Journal of Perinatology, Ultrasound in Obstetrics and Gynecology, The Journal of Maternal-Fetal & Neonatal Medicine and Trends in Food Science & Technology.
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.