J. A. Van Zyl
- Reproductive Medicine top 0.2%
- Public Health, Environmental and Occupational Health top 1%
- Genetics top 5%
- Pediatrics, Perinatology and Child Health top 5%
- Molecular Biology
- Co-authors
- Roelof MenkveldF. S. H. StanderThinus F. KrugerKaren L. SmithJacobus P. van der MerweCarl LombardT. KotzeC.J. Nortjé
- Topics
- Sperm and Testicular Function (8 papers)Reproductive Health and Technologies (7 papers)Reproductive Biology and Fertility (4 papers)
- Cited by
- Reproductive MedicinePublic Health, Environmental and Occupational HealthPediatrics, Perinatology and Child Health
- Partner nations
- South AfricaUnited States
In The Last Decade
J. A. Van Zyl
31 papers receiving 2.0k citations
Hit Papers
Peers
Comparison fields: 5 of 99
- Reproductive Medicine 1.6k
- Public Health, Environmental and Occupational Health 1.2k
- Genetics 387
- Pediatrics, Perinatology and Child Health 310
- Molecular Biology 239
Countries citing papers authored by J. A. Van Zyl
This map shows the geographic impact of J. A. Van Zyl'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 J. A. Van Zyl with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites J. A. Van Zyl more than expected).
Fields of papers citing papers by J. A. Van Zyl
This network shows the impact of papers produced by J. A. Van Zyl. 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 J. A. Van Zyl. The network helps show where J. A. Van Zyl may publish in the future.
Co-authorship network of co-authors of J. A. Van Zyl
This figure shows the co-authorship network connecting the top 25 collaborators of J. A. Van Zyl. A scholar is included among the top collaborators of J. A. Van Zyl 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 J. A. Van Zyl. J. A. Van Zyl is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
| # | Work | Indexed citations |
|---|---|---|
| 1 | 0 | |
| 2 | 9 | |
| 3 | 180 | |
| 4 | 21 | |
| 5 | The evaluation of morphological characteristics of human spermatozoa according to stricter criteriabreakdown → | 539 |
| 6 | 9 | |
| 7 | Breast-conserving treatment for stage I and II cancer. Tumour excision, axillary dissection, peri-operative interstitial irradiation, with or without peri-operative chemotherapy, followed by breast irradiation--the Tygerberg Hospital experience. | 2 |
| 8 | Sex and infertility. Part I. Prevalence of psychosexual problems and subjacent factors. | 7 |
| 9 | Sperm morphologic features as a prognostic factor in in vitro fertilizationbreakdown → | 993 |
| 10 | 2 | |
| 11 | Extracranial internal carotid artery aneurysm. A case report. | 1 |
| 12 | [A comparative study of the white cell pipette method and the Makler counting chamber method of counting spermatozoa]. | 4 |
| 13 | The infertile couple: Part I. Schedule of management. | 2 |
| 14 | Oligozoospermia: a seven-year survey of the incidence, chromosomal aberrations, treatment and pregnancy rate. | 65 |
| 15 | 9 | |
| 16 | 1 | |
| 17 | 5 | |
| 18 | 1 | |
| 19 | 5 | |
| 20 | A primate research colony: the Stellenbosch-Johns Hopkins Baboon Facility. | 2 |
About J. A. Van Zyl
J. A. Van Zyl is a scholar working on Reproductive Medicine, Transplantation and Nephrology, having authored 33 papers that have together received 2.1k indexed citations. Recurring topics across this work include Sperm and Testicular Function (8 papers), Reproductive Health and Technologies (7 papers) and Reproductive Biology and Fertility (4 papers). The work is most often cited by research in Reproductive Medicine (1.6k citations), Public Health, Environmental and Occupational Health (1.2k citations) and Pediatrics, Perinatology and Child Health (310 citations). J. A. Van Zyl has collaborated with scholars based in South Africa and United States. Frequent co-authors include Roelof Menkveld, F. S. H. Stander, Thinus F. Kruger, Karen L. Smith, Jacobus P. van der Merwe, Carl Lombard, T. Kotze, C.J. Nortjé, F.W. Grotepass and L. Goedhals. Their work appears in journals such as Journal of Clinical Oncology, Annals of Surgery and The Journal of Urology.
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.