Karl R. Hansen

7.5k citations

101 papers · 4.2k indexed · 4 hit papers · h-index 29

Reproductive Medicine top 0.2%
- Ovarian function and disorders 50
- Reproductive Health and Technologies 21
- Sperm and Testicular Function 10
- Ovarian cancer diagnosis and treatment 7
- Endometriosis Research and Treatment 6
Physiology top 0.2%
Public Health, Environmental and Occupational Health top 1%
- Reproductive Biology and Fertility 37
Obstetrics and Gynecology top 2%
- Gestational Diabetes Research and Management 6
Pediatrics, Perinatology and Child Health top 1%
- Assisted Reproductive Technology and Twin Pregnancy 30

Co-authors: Nicholas Knowlton Linda F. Thompson LaTasha B. Craig Katrina M. Comerford Jörn Karhausen Sean P. Colgan Holger K. Eltzschig Glenn T. Furuta
Cited by: Reproductive Medicine Physiology Public Health, Environmental and Occupational Health
Partner nations: United States France Germany

In The Last Decade

Karl R. Hansen

93 papers receiving 4.1k citations

Hit Papers

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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.

2020 Testing and interpreting measures of ovarian reserve: a committee opinion
2010 Correlation of ovarian reserve tests with histologically determined primordial follicle number
2002 Ecto-5′-nucleotidase (CD73) regulation by hypoxia-inducible factor-1 mediates permeability changes in intestinal epithelia
2002 Ecto-5′-nucleotidase (CD73) regulation by hypoxia-inducible factor-1 mediates permeability changes in intestinal epithelia

Peers

Countries citing papers authored by Karl R. Hansen

Since Specialization

Citations

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

Fields of papers citing papers by Karl R. Hansen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karl R. Hansen. 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 Karl R. Hansen. The network helps show where Karl R. Hansen may publish in the future.

Co-authorship network

The 25 scholars most cited alongside Karl R. Hansen, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Karl R. Hansen Line = papers co-authored together Karl R. Hansen links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Cryptosporidium and Giardia infections of lambs in Southwest Norway: a longitudinal study Tsegabirhan Kifleyohannes,Elin Skorpen,Karl R. Hansen,Snorre Stuen,Lucy J. Robertson	2025	0
2	Weight loss before conception: effects on atherogenic apolipoprotein lipid particles and endothelial function during pregnancy Robert Wild,Daniel Zhao,Michael J McPhaul,Rodney K. Edwards,Karl R. Hansen,Elizabeth L. Wolfe,David S. Wrenn	2025	0
3	Highly Atherogenic Lipid Particles are Associated with Preeclampsia After Successful Fertility Treatment for Obese Women who have Unexplained Infertility Robert A. Wild,Rodney K. Edwards,Dong-xu Zhao,Karl R. Hansen,A. S. Kim,David Wrenn	2023	1
4	Moderate and increased physical activity is not detrimental to live birth rates among women with unexplained infertility and obesity Wendy Vitek,Fangbai Sun,Eden R. Cardozo,Kathleen M. Hoeger,Karl R. Hansen,Nanette Santoro,Heping Zhang,Richard S. Legro	2023	1
5	Proprotein Convertase Subtilisin Kexin 9 (PCSK9) and nonHDL particles rise during normal pregnancy and differ by BMI Robert A. Wild,Elizabeth A. Weedin,Keith Cox,Yanglu Zhao,David Wrenn,Dayami Lopez,Catherine Wooten,Quantil Melendez,D. Myers,Karl R. Hansen	2022	5
6	Sperm deoxyribonucleic acid fragmentation: predictors, fertility outcomes, and assays among infertile males Julie Sroga Rios,R. Matthew Coward,Karl R. Hansen,Kurt T. Barnhart,Marcelle I. Cedars,Richard S. Legro,Michael P. Diamond,Stephen A. Krawetz,Rebecca Usadi,Valerie L. Baker,Fangbai Sun,Robert A. Wild,James F. Smith,Nanette Santoro,Heping Zhang,Anne Z. Steiner	2021	5
7	Endometrial thickness after ovarian stimulation with gonadotropin, clomiphene, or letrozole for unexplained infertility, and association with treatment outcomes Alexander Quaas,Sarah Z. Gavrizi,Jennifer D. Peck,Michael P. Diamond,Richard S. Legro,Randal D. Robinson,Peter R. Casson,Gregory M. Christman,Heping Zhang,Karl R. Hansen	2020	18
8	Letrozole “stair-step” protocol in patients with polycystic ovary syndrome Rhoda J. Conant,J.P. Dubaut,Karl R. Hansen,LaTasha B. Craig,Heather R. Burks,Alexander Quaas	2017	0
9	Predictors of pregnancy and live-birth in couples with unexplained infertility after ovarian stimulation–intrauterine insemination Karl R. Hansen,Amy Linnea W. He,Aaron K. Styer,Robert A. Wild,Samantha Butts,Lawrence Engmann,Michael P. Diamond,Richard S. Legro,Christos Coutifaris,Ruben Alvero,Randal D. Robinson,Peter R. Casson,Gregory M. Christman,Hao Huang,Nanette Santoro,Esther Eisenberg,Heping Zhang	2016	79
10	The role of steroid hormone supplementation in non–assisted reproductive technology treatments for unexplained infertility Alexander Quaas,Karl R. Hansen	2016	8
11	Chlamydia trachomatis immunoglobulin G3 seropositivity is a predictor of reproductive outcomes in infertile women with patent fallopian tubes Anne Z. Steiner,Michael P. Diamond,Richard S. Legro,William D. Schlaff,Kurt T. Barnhart,Peter R. Casson,Gregory M. Christman,Ruben Alvero,Karl R. Hansen,William M. Geisler,Tracey Thomas,Nanette Santoro,Heping Zhang,Esther Eisenberg	2015	33
12	Does a difficult intrauterine insemination lower pregnancy rates and live birth rates? S. Khan,B. Storer,Jennifer D. Peck,Lindsey Goddard,Karl R. Hansen,LaTasha B. Craig	2013	1
13	Correlation of ovarian reserve tests with histologically determined primordial follicle numberbreakdown → Karl R. Hansen,George M. Hodnett,Nicholas Knowlton,LaTasha B. Craig	2010	415
14	Reproductive aging and variability in the ovarian antral follicle count: application in the clinical setting Karl R. Hansen,Jamie L Morris,Angela Thyer,Michael R. Soules	2003	83
15	Activation of the Sympathetic Nervous System by Galanin-Like Peptide—A Possible Link between Leptin and Metabolism Karl R. Hansen,Stephanie M. Krasnow,Michael A. Nolan,Gregory S. Fraley,James W. Baumgartner,Donald K. Clifton,Robert A. Steiner	2003	58
16	Ecto-5′-nucleotidase (CD73) regulation by hypoxia-inducible factor-1 mediates permeability changes in intestinal epithelia Kristin Synnestvedt,Glenn T. Furuta,Katrina M. Comerford,Nancy A. Louis,Jörn Karhausen,Holger K. Eltzschig,Karl R. Hansen,Linda F. Thompson,Sean P. Colgan	2002	28
17	Ecto-5′-nucleotidase (CD73) regulation by hypoxia-inducible factor-1 mediates permeability changes in intestinal epitheliabreakdown → Kristin Synnestvedt,Glenn T. Furuta,Katrina M. Comerford,Nancy A. Louis,Jörn Karhausen,Holger K. Eltzschig,Karl R. Hansen,Linda F. Thompson,Sean P. Colgan	2002	584
18	Isolation and characterization of the promoter of the human 5′-nucleotidase (CD73)-encoding gene Karl R. Hansen,Regina Resta,Carol F. Webb,Linda F. Thompson	1995	49
19	Segmentale Innervation : ihre Bedeutung für Klinik und Praxis Karl R. Hansen,H Schliack	1962	38
20	ÜBER DEN PRAUSNITZ‐KÜSTNERSCHEN VERSUCH* Karl R. Hansen	1954	3

About Karl R. Hansen

Karl R. Hansen is a scholar working on Reproductive Medicine, Pediatrics, Perinatology and Child Health and Public Health, Environmental and Occupational Health, having authored 101 papers that have together received 4.2k indexed citations. Recurring topics across this work include Ovarian function and disorders (50 papers), Reproductive Biology and Fertility (37 papers), Assisted Reproductive Technology and Twin Pregnancy (30 papers), Reproductive Health and Technologies (21 papers), Sperm and Testicular Function (10 papers), Ovarian cancer diagnosis and treatment (7 papers), Endometriosis Research and Treatment (6 papers) and Gestational Diabetes Research and Management (6 papers). The work is most often cited by research in Reproductive Medicine (1.9k citations), Physiology (722 citations) and Public Health, Environmental and Occupational Health (1.5k citations). Karl R. Hansen has collaborated with scholars based in United States, France and Germany. Frequent co-authors include Nicholas Knowlton, Linda F. Thompson, LaTasha B. Craig, Katrina M. Comerford, Jörn Karhausen, Sean P. Colgan, Holger K. Eltzschig, Glenn T. Furuta, Nancy A. Louis and Michael R. Soules.

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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