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Karl Hansen

Concepts (312)

Concepts are derived automatically from a person's publications.
Concepts are listed by decreasing relevance which is based on many factors, including how many publications the person wrote about that topic, how long ago those publications were written, and how many publications other people have written on that same topic.


Name Number of Publications Most Recent Publication Publications by All Authors Concept Score Why?
Infertility, Female
19
2022
43
3.800
Why?
Infertility
10
2022
35
3.540
Why?
Ovulation Induction
14
2022
34
2.880
Why?
Ovarian Follicle
10
2019
84
2.460
Why?
Live Birth
14
2021
40
2.340
Why?
Insemination, Artificial
9
2025
27
1.750
Why?
Polycystic Ovary Syndrome
14
2022
65
1.640
Why?
Pregnancy
33
2025
1260
1.530
Why?
Infertility, Male
8
2022
23
1.520
Why?
Pregnancy Rate
17
2025
49
1.220
Why?
Watchful Waiting
4
2022
18
1.210
Why?
Aging
11
2019
1019
1.200
Why?
Female
59
2025
15690
1.190
Why?
Fertility
8
2022
60
1.170
Why?
Fertility Agents, Female
8
2022
15
1.160
Why?
Luteal Phase
2
2019
7
1.160
Why?
Progesterone
3
2019
130
1.100
Why?
Pregnancy, Ectopic
4
2021
11
1.070
Why?
Abortifacient Agents, Nonsteroidal
3
2021
5
1.040
Why?
Reproduction
4
2012
64
1.030
Why?
Humans
67
2025
28998
0.930
Why?
Adult
44
2025
8048
0.900
Why?
Ovary
3
2013
72
0.880
Why?
Reproductive Techniques, Assisted
5
2021
17
0.860
Why?
Hysterosalpingography
2
2020
4
0.790
Why?
Embryo Transfer
3
2021
13
0.790
Why?
Fertilization in Vitro
6
2021
24
0.760
Why?
Models, Biological
3
2014
469
0.740
Why?
Proprotein Convertases
1
2022
12
0.740
Why?
Prospective Studies
14
2022
1283
0.740
Why?
Insulin Resistance
3
2022
176
0.730
Why?
Life Style
3
2022
91
0.710
Why?
Progestins
2
2019
12
0.700
Why?
Cryopreservation
2
2021
13
0.680
Why?
Ovarian Reserve
2
2019
9
0.630
Why?
Ultrasonography
6
2018
243
0.620
Why?
Gonadotropins
5
2020
22
0.590
Why?
Spermatozoa
4
2025
34
0.570
Why?
Biomarkers
8
2022
782
0.570
Why?
Estradiol
4
2014
176
0.560
Why?
Chorionic Gonadotropin
3
2021
22
0.520
Why?
Gonadal Steroid Hormones
1
2016
24
0.500
Why?
Pregnancy Outcome
6
2021
131
0.500
Why?
Obesity
6
2022
702
0.480
Why?
Clomiphene
5
2021
11
0.480
Why?
Sperm Count
4
2025
17
0.470
Why?
Premenopause
1
2015
20
0.470
Why?
Off-Label Use
1
2015
6
0.450
Why?
Drug Labeling
1
2015
4
0.450
Why?
Endometriosis
1
2015
19
0.440
Why?
Birth Rate
1
2014
11
0.440
Why?
Drug Prescriptions
1
2015
46
0.440
Why?
Follicle Stimulating Hormone
4
2012
71
0.440
Why?
Ovariectomy
2
2012
53
0.410
Why?
Primary Ovarian Insufficiency
1
2013
6
0.410
Why?
Semen
3
2022
29
0.390
Why?
Evidence-Based Medicine
1
2013
148
0.380
Why?
Treatment Outcome
11
2022
2427
0.370
Why?
Abortion, Spontaneous
3
2021
17
0.370
Why?
Male
20
2025
13983
0.360
Why?
Pregnancy, Multiple
3
2015
8
0.350
Why?
Young Adult
15
2022
2842
0.350
Why?
Insemination
2
2020
6
0.320
Why?
Methotrexate
2
2021
36
0.320
Why?
Sperm Motility
3
2025
16
0.310
Why?
Randomized Controlled Trials as Topic
7
2022
413
0.300
Why?
5'-Nucleotidase
4
2002
13
0.300
Why?
Body Mass Index
5
2022
415
0.290
Why?
Antioxidants
2
2021
224
0.290
Why?
Inhibins
4
2012
8
0.280
Why?
Follicular Phase
2
2004
8
0.280
Why?
Middle Aged
10
2019
7428
0.270
Why?
Adolescent
13
2021
3223
0.270
Why?
United States
8
2022
2247
0.250
Why?
Triazoles
2
2015
16
0.230
Why?
Nitriles
2
2015
38
0.230
Why?
Patient Selection
2
2015
151
0.220
Why?
Risk Factors
7
2022
2134
0.220
Why?
Triglycerides
2
2022
123
0.210
Why?
Retrospective Studies
6
2025
2644
0.210
Why?
Galanin-Like Peptide
1
2003
1
0.200
Why?
Infant, Newborn
4
2020
924
0.200
Why?
Sympathetic Nervous System
1
2003
68
0.190
Why?
Metabolic Syndrome
2
2021
80
0.190
Why?
Insemination, Artificial, Homologous
2
2020
4
0.190
Why?
Dilatation and Curettage
2
2021
4
0.190
Why?
Androgens
2
2020
47
0.190
Why?
Chi-Square Distribution
4
2015
145
0.190
Why?
Proprotein Convertase 9
1
2022
4
0.190
Why?
Subtilisins
1
2022
6
0.190
Why?
Semen Analysis
4
2025
13
0.180
Why?
Cholesterol, LDL
1
2022
64
0.180
Why?
Testosterone
2
2019
74
0.180
Why?
Predictive Value of Tests
3
2016
485
0.180
Why?
Decision Support Techniques
1
2022
51
0.180
Why?
Cohort Studies
5
2022
898
0.180
Why?
Lipoproteins
1
2022
99
0.180
Why?
Vitamins
1
2021
23
0.180
Why?
Hydrocortisone
1
2022
89
0.170
Why?
Anti-Mullerian Hormone
2
2012
6
0.170
Why?
Precision Medicine
1
2022
82
0.170
Why?
Sleep
1
2021
112
0.170
Why?
Cholesterol
1
2022
204
0.170
Why?
Endometrium
1
2020
39
0.160
Why?
Ethiodized Oil
1
2020
2
0.160
Why?
Fertility Agents
1
2020
2
0.160
Why?
Gonadotropin-Releasing Hormone
2
2015
37
0.160
Why?
Fertilization
2
2022
10
0.160
Why?
Surveys and Questionnaires
3
2021
1011
0.160
Why?
Child Behavior
1
2020
30
0.160
Why?
Pregnancy Complications
1
2021
112
0.160
Why?
Child
3
2020
2327
0.160
Why?
BRCA2 Protein
1
2019
20
0.150
Why?
Reproductive Medicine
2
2018
4
0.150
Why?
BRCA1 Protein
1
2019
25
0.150
Why?
Metformin
1
2020
36
0.150
Why?
Contrast Media
1
2020
96
0.150
Why?
Fallopian Tubes
2
2018
15
0.150
Why?
Erectile Dysfunction
1
2019
15
0.150
Why?
Water
1
2020
135
0.150
Why?
Ovulation
2
2018
28
0.150
Why?
Spermatogenesis
1
2019
11
0.150
Why?
Leiomyoma
1
2019
9
0.150
Why?
Child Development
1
2020
79
0.150
Why?
Endocrinologists
1
2019
2
0.150
Why?
National Institute of Child Health and Human Development (U.S.)
1
2018
2
0.150
Why?
Ethics Committees, Research
1
2018
6
0.150
Why?
Clinical Protocols
1
2018
46
0.140
Why?
Pre-Eclampsia
1
2018
49
0.140
Why?
Menstrual Cycle
2
2012
24
0.140
Why?
Gynecology
1
2019
60
0.140
Why?
Antidepressive Agents
1
2018
29
0.140
Why?
Reproducibility of Results
3
2010
788
0.140
Why?
Vitamin D
1
2018
51
0.140
Why?
Vitamin D Deficiency
1
2018
31
0.140
Why?
Transcriptome
1
2019
232
0.130
Why?
Diabetes, Gestational
1
2018
73
0.130
Why?
Quality of Life
2
2019
523
0.130
Why?
Sexual Dysfunction, Physiological
1
2017
6
0.130
Why?
Depression
1
2019
227
0.130
Why?
Oxidative Stress
1
2021
678
0.130
Why?
Depressive Disorder, Major
1
2018
127
0.120
Why?
Alcohol Drinking
2
2015
176
0.120
Why?
Contraceptives, Oral
1
2015
23
0.120
Why?
Chlamydia trachomatis
1
2015
16
0.120
Why?
Chlamydia Infections
1
2015
17
0.120
Why?
Patient Dropouts
1
2015
6
0.120
Why?
Multicenter Studies as Topic
3
2021
50
0.120
Why?
Promoter Regions, Genetic
2
2002
344
0.120
Why?
Cross-Sectional Studies
2
2017
1004
0.120
Why?
Ovulation Inhibition
1
2015
1
0.110
Why?
Contraceptives, Oral, Hormonal
1
2015
9
0.110
Why?
Referral and Consultation
1
2015
98
0.110
Why?
Antibodies, Bacterial
1
2015
103
0.110
Why?
Organ Size
2
2020
88
0.110
Why?
United States Food and Drug Administration
1
2015
46
0.110
Why?
Time Factors
2
2018
1619
0.110
Why?
Models, Theoretical
1
2015
134
0.110
Why?
Case-Control Studies
3
2018
739
0.100
Why?
Regulatory Sequences, Nucleic Acid
1
1994
26
0.100
Why?
Analysis of Variance
1
2014
393
0.100
Why?
Immunoglobulin G
1
2015
272
0.100
Why?
Severity of Illness Index
2
2013
466
0.100
Why?
Androgen-Insensitivity Syndrome
1
2013
4
0.100
Why?
Protein Biosynthesis
1
1994
111
0.100
Why?
Preoperative Care
1
2013
81
0.100
Why?
Research Design
2
2019
188
0.100
Why?
Prevalence
3
2019
521
0.100
Why?
Risk Assessment
4
2022
631
0.100
Why?
Congresses as Topic
1
2012
35
0.090
Why?
Smoking
1
2015
478
0.090
Why?
Down-Regulation
2
2019
202
0.080
Why?
Infant
2
2020
1049
0.080
Why?
Child, Preschool
2
2020
1196
0.080
Why?
Follow-Up Studies
3
2020
1032
0.080
Why?
RNA, Messenger
3
2003
668
0.080
Why?
Multivariate Analysis
3
2015
303
0.080
Why?
Magnetic Resonance Imaging
1
2013
843
0.070
Why?
Recombinant Proteins
2
2004
417
0.070
Why?
Double-Blind Method
2
2020
426
0.070
Why?
Anthropometry
1
2008
94
0.070
Why?
Hyperandrogenism
2
2018
11
0.070
Why?
Observer Variation
2
2007
46
0.070
Why?
Hydronephrosis
1
2007
11
0.060
Why?
Ureteral Obstruction
1
2007
12
0.060
Why?
Base Sequence
4
1995
589
0.060
Why?
Animals
4
2013
10715
0.060
Why?
Cloning, Molecular
3
1995
208
0.060
Why?
Stents
1
2007
121
0.060
Why?
Molecular Sequence Data
4
1995
1056
0.060
Why?
Prognosis
2
2020
812
0.060
Why?
Image Processing, Computer-Assisted
1
2007
254
0.060
Why?
Phenotype
2
2018
687
0.060
Why?
Odds Ratio
2
2015
237
0.060
Why?
Inhibin-beta Subunits
1
2004
3
0.050
Why?
Activins
1
2004
4
0.050
Why?
Injections, Intraventricular
1
2003
7
0.050
Why?
Metabolism
1
2003
9
0.050
Why?
Arcuate Nucleus of Hypothalamus
1
2003
5
0.050
Why?
Pituitary Gland
1
2003
53
0.050
Why?
Academic Medical Centers
2
2015
76
0.050
Why?
Uncoupling Protein 1
1
2003
22
0.050
Why?
Adipose Tissue, Brown
1
2003
22
0.050
Why?
Ion Channels
1
2003
28
0.050
Why?
Pro-Opiomelanocortin
1
2003
14
0.050
Why?
Reference Values
1
2003
200
0.050
Why?
Eating
1
2003
71
0.050
Why?
Leptin
1
2003
67
0.050
Why?
Drug Administration Schedule
1
2003
225
0.050
Why?
Mitochondrial Proteins
1
2003
80
0.050
Why?
Logistic Models
2
2015
415
0.050
Why?
Body Weight
1
2003
253
0.050
Why?
alpha-Amylases
1
2022
3
0.050
Why?
Coitus
1
2022
14
0.050
Why?
Maternal Age
1
2022
25
0.050
Why?
Snoring
1
2021
8
0.040
Why?
Preconception Care
1
2022
18
0.040
Why?
Uterine Hemorrhage
1
2021
9
0.040
Why?
Carrier Proteins
1
2003
256
0.040
Why?
Clinical Decision-Making
1
2022
63
0.040
Why?
Ultrasonography, Prenatal
1
2021
36
0.040
Why?
Weight Loss
1
2022
83
0.040
Why?
Sleep Apnea, Obstructive
1
2021
43
0.040
Why?
Intestinal Mucosa
1
2002
198
0.040
Why?
Sleep Wake Disorders
1
2021
65
0.040
Why?
Immunohistochemistry
2
2019
465
0.040
Why?
Patient Satisfaction
1
2021
96
0.040
Why?
Nuclear Proteins
1
2002
249
0.040
Why?
Combined Modality Therapy
1
2021
303
0.040
Why?
Family Characteristics
1
2020
47
0.040
Why?
Gestures
1
2020
1
0.040
Why?
Rats
1
2003
1592
0.040
Why?
Heterozygote
1
2019
69
0.040
Why?
Germ-Line Mutation
1
2019
31
0.040
Why?
Weight Gain
1
2020
76
0.040
Why?
Membrane Proteins
1
2003
485
0.040
Why?
Observational Studies as Topic
1
2019
55
0.040
Why?
RNA Processing, Post-Transcriptional
1
2019
20
0.040
Why?
Chromatin Assembly and Disassembly
1
2019
20
0.040
Why?
Gene Regulatory Networks
1
2019
82
0.040
Why?
DNA-Binding Proteins
1
2002
490
0.040
Why?
Hypoglycemic Agents
1
2020
110
0.040
Why?
Transcription Factors
1
2002
523
0.040
Why?
Birth Weight
1
2018
63
0.040
Why?
Pilot Projects
1
2020
464
0.030
Why?
Mice, Inbred C57BL
1
2003
1661
0.030
Why?
Registries
1
2020
398
0.030
Why?
DNA Methylation
1
2019
153
0.030
Why?
Asian Americans
1
2018
40
0.030
Why?
Age Factors
1
2020
740
0.030
Why?
Exercise
1
2022
498
0.030
Why?
Diagnosis, Differential
1
2018
379
0.030
Why?
Sex Hormone-Binding Globulin
1
2017
4
0.030
Why?
Hirsutism
1
2017
18
0.030
Why?
Waist Circumference
1
2017
20
0.030
Why?
Mice
3
2003
4815
0.030
Why?
Hypertriglyceridemia
1
2017
8
0.030
Why?
Cognition
1
2020
331
0.030
Why?
Transcription, Genetic
2
1995
405
0.030
Why?
Laparoscopy
1
2018
156
0.030
Why?
Adenosine Deaminase
1
1995
5
0.030
Why?
Sequence Deletion
1
1995
66
0.030
Why?
Serologic Tests
1
2015
19
0.030
Why?
African Americans
1
2018
353
0.030
Why?
Base Composition
1
1995
111
0.030
Why?
Receptors, Purinergic P1
1
1995
2
0.030
Why?
Gene Expression Regulation, Enzymologic
1
1995
94
0.030
Why?
Blood Glucose
1
2017
310
0.030
Why?
Linear Models
1
2015
204
0.030
Why?
Enzyme-Linked Immunosorbent Assay
1
2015
257
0.030
Why?
Binding Sites
1
1995
355
0.030
Why?
Drug Therapy, Combination
1
2015
210
0.030
Why?
Antibodies
1
1995
125
0.030
Why?
Internet
1
2015
128
0.030
Why?
RNA Caps
1
1994
2
0.030
Why?
Genomic Library
1
1994
10
0.030
Why?
Restriction Mapping
1
1994
24
0.030
Why?
Gene Amplification
1
1994
23
0.030
Why?
Orchiectomy
1
2013
12
0.030
Why?
Epididymis
1
2013
8
0.030
Why?
Placenta
1
1994
78
0.020
Why?
Indians, North American
1
2018
544
0.020
Why?
Superovulation
1
2012
6
0.020
Why?
Alcoholic Beverages
1
2012
4
0.020
Why?
Coffee
1
2012
5
0.020
Why?
Tea
1
2012
7
0.020
Why?
Risk Reduction Behavior
1
2012
46
0.020
Why?
Abdominal Pain
1
2007
35
0.020
Why?
Emergency Service, Hospital
1
2007
123
0.010
Why?
Sequence Homology, Amino Acid
2
1995
133
0.010
Why?
Luteinizing Hormone
1
2004
57
0.010
Why?
Amino Acid Sequence
2
1995
697
0.010
Why?
Apyrase
1
2002
4
0.010
Why?
Hypoxia-Inducible Factor 1
1
2002
11
0.010
Why?
Cyclic AMP Response Element-Binding Protein
1
2002
25
0.010
Why?
Permeability
1
2002
61
0.010
Why?
Cell Hypoxia
1
2002
35
0.010
Why?
Adenosine Triphosphatases
1
2002
50
0.010
Why?
Hypoxia-Inducible Factor 1, alpha Subunit
1
2002
59
0.010
Why?
Antigens, CD
1
2002
140
0.010
Why?
Cells, Cultured
1
2002
1022
0.010
Why?
Gene Expression Regulation
1
2002
635
0.010
Why?
Chickens
1
1995
62
0.010
Why?
Antibody Formation
1
1995
77
0.010
Why?
DNA Primers
1
1995
147
0.010
Why?
Mice, Inbred BALB C
1
1995
278
0.010
Why?
Ribonucleases
1
1993
9
0.010
Why?
Peptide Fragments
1
1995
202
0.010
Why?
Organ Specificity
1
1993
82
0.010
Why?
Blotting, Western
1
1995
515
0.010
Why?
Polymerase Chain Reaction
1
1993
270
0.010
Why?
DNA
1
1993
378
0.010
Why?
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