Martin Ja

1.1k total citations · 1 hit paper
7 papers, 973 citations indexed

About

Martin Ja is a scholar working on Pediatrics, Perinatology and Child Health, General Health Professions and Demography. According to data from OpenAlex, Martin Ja has authored 7 papers receiving a total of 973 indexed citations (citations by other indexed papers that have themselves been cited), including 5 papers in Pediatrics, Perinatology and Child Health, 2 papers in General Health Professions and 2 papers in Demography. Recurrent topics in Martin Ja's work include Assisted Reproductive Technology and Twin Pregnancy (4 papers), Global Maternal and Child Health (3 papers) and Child and Adolescent Health (2 papers). Martin Ja is often cited by papers focused on Assisted Reproductive Technology and Twin Pregnancy (4 papers), Global Maternal and Child Health (3 papers) and Child and Adolescent Health (2 papers). Martin Ja collaborates with scholars based in . Martin Ja's co-authors include Ventura Sj, Peter Drake, Fay Menacker and Stuart C. Clarke and has published in prestigious journals such as PubMed.

In The Last Decade

Martin Ja

7 papers receiving 906 citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Births: Final Data for 2016.

2018 444 citations Martin Ja, Peter Drake et al. PubMed profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Martin Ja	7	483	342	250	150	138	7	973
J A Martin United States	9	452 0.9×	283 0.8×	235 0.9×	202 1.3×	155 1.1×	9	1.1k
Phillip J. Marty United States	21	482 1.0×	413 1.2×	280 1.1×	202 1.3×	149 1.1×	63	1.2k
Kaisa Raatikainen Finland	17	712 1.5×	521 1.5×	344 1.4×	239 1.6×	104 0.8×	22	1.2k
Aniket Kulkarni United States	16	654 1.4×	235 0.7×	399 1.6×	201 1.3×	84 0.6×	31	1.3k
Christine Hockley United Kingdom	15	564 1.2×	185 0.5×	195 0.8×	153 1.0×	232 1.7×	18	1.0k
Hamisu M. Salihu United States	22	706 1.5×	570 1.7×	344 1.4×	134 0.9×	296 2.1×	57	1.6k
Valerie E. Whiteman United States	23	707 1.5×	610 1.8×	437 1.7×	121 0.8×	220 1.6×	60	1.5k
Mette Christophersen Tollånes Norway	18	386 0.8×	273 0.8×	161 0.6×	137 0.9×	90 0.7×	42	925
Yvonne Schönbeck Netherlands	15	456 0.9×	240 0.7×	575 2.3×	143 1.0×	149 1.1×	24	1.3k
Beverley Botting United Kingdom	18	643 1.3×	214 0.6×	216 0.9×	168 1.1×	90 0.7×	37	1.3k

Countries citing papers authored by Martin Ja

Since Specialization

Citations

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

Fields of papers citing papers by Martin Ja

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Martin Ja

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

All Works

Sort: Min cites: Since: Top N: Style:

7 of 7 papers shown

1.

Ja, Martin, et al.. (2018). Births: Final Data for 2016.. PubMed. 67(1). 1–55. 444 indexed citations breakdown →

2.

Ja, Martin, et al.. (2015). Births: Preliminary Data for 2014.. PubMed. 64(6). 1–19. 55 indexed citations

3.

Sj, Ventura, et al.. (2001). Births: final data for 1999.. PubMed. 49(1). 1–100. 183 indexed citations

4.

Sj, Ventura, et al.. (1998). Report of final natality statistics, 1996.. PubMed. 46(11 Suppl). 1–99. 169 indexed citations

5.

Sj, Ventura, et al.. (1998). Births and deaths: preliminary data for 1997.. PubMed. 47(4). 1–41. 61 indexed citations

6.

Clarke, Stuart C., et al.. (1997). Trends and characteristics of births attended by midwives.. PubMed. 78(1). 9–18. 14 indexed citations

7.

Ja, Martin, et al.. (1997). Triplet births: trends and outcomes, 1971-94.. PubMed. 1–20. 47 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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