Chikahiro Oka
- Public Health, Environmental and Occupational Health top 5%
- Reproductive Medicine top 2%
- Pediatrics, Perinatology and Child Health top 10%
- Molecular Biology
- Obstetrics and Gynecology top 10%
- Co-authors
- Tetsunori MukaidaTetsuya GotoK. TakahashiKatsuhiko TakahashiTatsuhiro TomiyamaKentaro TakahashiTsunehisa MakinoKen‐ichi Iwasaki
- Topics
- Reproductive Biology and Fertility (8 papers)Assisted Reproductive Technology and Twin Pregnancy (4 papers)Reproductive Health and Technologies (3 papers)
- Cited by
- Reproductive MedicinePublic Health, Environmental and Occupational HealthPediatrics, Perinatology and Child Health
- Journals
- Human ReproductionFertility and SterilityEuropean Journal of Obstetrics & Gynecology and Reproductive Biology
- Partner nations
- Japan
In The Last Decade
Chikahiro Oka
12 papers receiving 382 citations
Peers
Comparison fields: 5 of 30
- Public Health, Environmental and Occupational Health 340
- Reproductive Medicine 269
- Pediatrics, Perinatology and Child Health 184
- Molecular Biology 80
- Obstetrics and Gynecology 53
Countries citing papers authored by Chikahiro Oka
This map shows the geographic impact of Chikahiro Oka'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 Chikahiro Oka with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Chikahiro Oka more than expected).
Fields of papers citing papers by Chikahiro Oka
This network shows the impact of papers produced by Chikahiro Oka. 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 Chikahiro Oka. The network helps show where Chikahiro Oka may publish in the future.
Co-authorship network of co-authors of Chikahiro Oka
This figure shows the co-authorship network connecting the top 25 collaborators of Chikahiro Oka. A scholar is included among the top collaborators of Chikahiro Oka based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Chikahiro Oka. Chikahiro Oka is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
| # | Work | Indexed citations |
|---|---|---|
| 1 | 1 | |
| 2 | 29 | |
| 3 | 3 | |
| 4 | 155 | |
| 5 | 120 | |
| 6 | 4 | |
| 7 | 35 | |
| 8 | 5 | |
| 9 | 1 | |
| 10 | 18 | |
| 11 | 33 | |
| 12 | Chemical abortion in patients with recurrent fetal loss. | 2 |
About Chikahiro Oka
Chikahiro Oka is a scholar working on Reproductive Medicine, Public Health, Environmental and Occupational Health and Obstetrics and Gynecology, having authored 12 papers that have together received 406 indexed citations. Recurring topics across this work include Reproductive Biology and Fertility (8 papers), Assisted Reproductive Technology and Twin Pregnancy (4 papers) and Reproductive Health and Technologies (3 papers). The work is most often cited by research in Reproductive Medicine (269 citations), Public Health, Environmental and Occupational Health (340 citations) and Pediatrics, Perinatology and Child Health (184 citations). Chikahiro Oka has collaborated with scholars based in Japan. Frequent co-authors include Tetsunori Mukaida, Tetsuya Goto, K. Takahashi, Katsuhiko Takahashi, Tatsuhiro Tomiyama, Kentaro Takahashi, Tsunehisa Makino, Ken‐ichi Iwasaki, R Iizuka and Toshitaka Sugi. Their work appears in journals such as Human Reproduction, Fertility and Sterility and European Journal of Obstetrics & Gynecology and Reproductive Biology.
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.