Geert Hamer

3.0k total citations
56 papers, 2.1k citations indexed

About

Geert Hamer is a scholar working on Molecular Biology, Public Health, Environmental and Occupational Health and Reproductive Medicine. According to data from OpenAlex, Geert Hamer has authored 56 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 39 papers in Molecular Biology, 21 papers in Public Health, Environmental and Occupational Health and 20 papers in Reproductive Medicine. Recurrent topics in Geert Hamer's work include Reproductive Biology and Fertility (19 papers), DNA Repair Mechanisms (17 papers) and Sperm and Testicular Function (13 papers). Geert Hamer is often cited by papers focused on Reproductive Biology and Fertility (19 papers), DNA Repair Mechanisms (17 papers) and Sperm and Testicular Function (13 papers). Geert Hamer collaborates with scholars based in Netherlands, United States and United Kingdom. Geert Hamer's co-authors include Sjoerd Repping, Dirk G. de Rooij, Ans M. M. van Pelt, Sabrina Z. Jan, Henk B. Kal, Christer Höög, Iris S. Gademan, Tinke L. Vormer, Ricardo Benavente and Hermien L. Roepers‐Gajadien and has published in prestigious journals such as Journal of Biological Chemistry, PLoS ONE and Development.

In The Last Decade

Geert Hamer

52 papers receiving 2.1k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Geert Hamer Netherlands 26 1.2k 929 804 407 227 56 2.1k
Maria M. Viveiros United States 21 1.6k 1.3× 589 0.6× 1.5k 1.9× 506 1.2× 108 0.5× 35 2.5k
Rabindranath De La Fuente United States 23 2.3k 1.9× 638 0.7× 1.5k 1.8× 789 1.9× 108 0.5× 43 3.0k
Aleksandar Rajkovic United States 20 1.4k 1.2× 698 0.8× 1.6k 2.0× 1.0k 2.5× 147 0.6× 35 2.5k
Eva R. Hoffmann Denmark 29 1.4k 1.2× 318 0.3× 543 0.7× 398 1.0× 131 0.6× 69 2.2k
Su‐Ren Chen China 23 775 0.6× 737 0.8× 582 0.7× 415 1.0× 229 1.0× 50 1.6k
Michal Kubelka Czechia 28 1.6k 1.3× 608 0.7× 1.5k 1.8× 322 0.8× 107 0.5× 65 2.4k
Esther B. Baart Netherlands 22 926 0.8× 878 0.9× 1.2k 1.5× 452 1.1× 128 0.6× 47 2.4k
P. de Boer Netherlands 25 1.2k 1.0× 682 0.7× 662 0.8× 656 1.6× 207 0.9× 81 2.1k
Kenshiro Hara Japan 21 945 0.8× 642 0.7× 651 0.8× 385 0.9× 79 0.3× 57 1.7k
Julio E. Agno United States 17 1.1k 0.9× 488 0.5× 573 0.7× 421 1.0× 206 0.9× 19 1.7k

Countries citing papers authored by Geert Hamer

Since Specialization
Citations

This map shows the geographic impact of Geert Hamer'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 Geert Hamer with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Geert Hamer more than expected).

Fields of papers citing papers by Geert Hamer

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Geert Hamer. 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 Geert Hamer. The network helps show where Geert Hamer may publish in the future.

Co-authorship network of co-authors of Geert Hamer

This figure shows the co-authorship network connecting the top 25 collaborators of Geert Hamer. A scholar is included among the top collaborators of Geert Hamer 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 Geert Hamer. Geert Hamer is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Hamer, Geert, et al.. (2025). Building a human pluripotent stem cell-based gonadal niche: improving in vitro systems with in vivo insights. Human Reproduction Update. 31(6). 559–587.
2.
Ploem, M.C., C.L. Mulder, Ans M. M. van Pelt, et al.. (2025). Stem cell-derived gametes: what to expect when expecting their clinical introduction. Human Reproduction. 40(9). 1605–1615. 2 indexed citations
3.
Hamer, Geert, et al.. (2025). Generating human primordial germ cell-like cells from pluripotent stem cells: a scoping review of in vitro methods. Human Reproduction Open. 2025(4). hoaf056–hoaf056.
4.
Mitchell, Rod T., et al.. (2024). Impacts of cancer therapy on male fertility: Past and present. Molecular Aspects of Medicine. 100. 101308–101308. 7 indexed citations
5.
Liu, Wenqing, et al.. (2024). Germline specific genes increase DNA double-strand break repair and radioresistance in lung adenocarcinoma cells. Cell Death and Disease. 15(1). 38–38. 2 indexed citations
6.
Köster, Jan, et al.. (2022). How germline genes promote malignancy in cancer cells. BioEssays. 45(1). e2200112–e2200112. 12 indexed citations
7.
Pelt, Ans M. M. van, et al.. (2022). In vitro spermatogenesis: Why meiotic checkpoints matter. Current topics in developmental biology. 151. 345–369. 7 indexed citations
8.
Fan, Xueying, Ioannis Moustakas, Geert Hamer, et al.. (2021). Transcriptional progression during meiotic prophase I reveals sex-specific features and X chromosome dynamics in human fetal female germline. PLoS Genetics. 17(9). e1009773–e1009773. 10 indexed citations
9.
Keijser, Remco, Sjoerd Repping, Cornelis B. Lambalk, et al.. (2020). High-quality human preimplantation embryos stimulate endometrial stromal cell migration via secretion of microRNA hsa-miR-320a. Human Reproduction. 35(8). 1797–1807. 28 indexed citations
10.
Chen, Xiaoxu, Yi Zheng, Anmin Lei, et al.. (2020). Early cleavage of preimplantation embryos is regulated by tRNAGln-TTG–derived small RNAs present in mature spermatozoa. Journal of Biological Chemistry. 295(32). 10885–10900. 55 indexed citations
11.
Hamer, Geert, Pirkka‐Pekka Laurila, Manuela Tumiati, et al.. (2019). Transcription Factor USF1 Is Required for Maintenance of Germline Stem Cells in Male Mice. Endocrinology. 160(5). 1119–1136. 17 indexed citations
12.
Hwang, Grace H., et al.. (2018). Depletion of SMC5/6 sensitizes male germ cells to DNA damage. Molecular Biology of the Cell. 29(25). 3003–3016. 16 indexed citations
13.
Zheng, Yi, Aldo Jongejan, C.L. Mulder, et al.. (2017). Trivial role for NSMCE2 during in vitro proliferation and differentiation of male germline stem cells. Reproduction. 154(3). 181–195. 16 indexed citations
14.
Jan, Sabrina Z., Tinke L. Vormer, Aldo Jongejan, et al.. (2017). Unraveling transcriptome dynamics in human spermatogenesis. Development. 144(20). 3659–3673. 128 indexed citations
15.
Lambalk, Cornelis B., Judith A.F. Huirne, Velja Mijatovic, et al.. (2017). High-quality human preimplantation embryos actively influence endometrial stromal cell migration. Journal of Assisted Reproduction and Genetics. 35(4). 659–667. 29 indexed citations
16.
Hendriks, Saskia, Eline Dancet, Ans M. M. van Pelt, Geert Hamer, & Sjoerd Repping. (2015). Artificial gametes: a systematic review of biological progress towards clinical application. Human Reproduction Update. 21(3). 285–296. 60 indexed citations
17.
Jan, Sabrina Z., Geert Hamer, Sjoerd Repping, et al.. (2012). Molecular control of rodent spermatogenesis. Biochimica et Biophysica Acta (BBA) - Molecular Basis of Disease. 1822(12). 1838–1850. 162 indexed citations
18.
Hamer, Geert, Ivana Novak, Anna Kouznetsova, & Christer Höög. (2007). Disruption of pairing and synapsis of chromosomes causes stage-specific apoptosis of male meiotic cells. Theriogenology. 69(3). 333–339. 52 indexed citations
19.
Hamer, Geert, Hermien L. Roepers‐Gajadien, Annemarie van Duyn-Goedhart, et al.. (2003). Function of DNA-Protein Kinase Catalytic Subunit During the Early Meiotic Prophase Without Ku70 and Ku861. Biology of Reproduction. 68(3). 717–721. 50 indexed citations
20.
Hamer, Geert, Hermien L. Roepers‐Gajadien, Annemarie van Duyn-Goedhart, et al.. (2003). DNA Double-Strand Breaks and γ-H2AX Signaling in the Testis1. Biology of Reproduction. 68(2). 628–634. 168 indexed citations

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.

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