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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
4.060
Why?
Infertility
10
2022
35
3.770
Why?
Ovulation Induction
14
2022
34
3.080
Why?
Ovarian Follicle
10
2019
84
2.630
Why?
Live Birth
14
2021
40
2.510
Why?
Insemination, Artificial
9
2025
27
1.870
Why?
Polycystic Ovary Syndrome
14
2022
64
1.760
Why?
Pregnancy
33
2025
1154
1.670
Why?
Infertility, Male
8
2022
23
1.620
Why?
Aging
11
2019
952
1.310
Why?
Pregnancy Rate
17
2025
49
1.300
Why?
Watchful Waiting
4
2022
18
1.300
Why?
Female
59
2025
14661
1.290
Why?
Fertility
8
2022
58
1.250
Why?
Fertility Agents, Female
8
2022
15
1.240
Why?
Luteal Phase
2
2019
7
1.240
Why?
Progesterone
3
2019
129
1.170
Why?
Pregnancy, Ectopic
4
2021
11
1.140
Why?
Abortifacient Agents, Nonsteroidal
3
2021
5
1.120
Why?
Reproduction
4
2012
63
1.100
Why?
Humans
67
2025
27160
1.010
Why?
Adult
44
2025
7506
0.980
Why?
Ovary
3
2013
69
0.940
Why?
Reproductive Techniques, Assisted
5
2021
17
0.920
Why?
Hysterosalpingography
2
2020
4
0.850
Why?
Embryo Transfer
3
2021
13
0.840
Why?
Fertilization in Vitro
6
2021
24
0.810
Why?
Models, Biological
3
2014
448
0.790
Why?
Proprotein Convertases
1
2022
11
0.790
Why?
Prospective Studies
14
2022
1221
0.790
Why?
Insulin Resistance
3
2022
172
0.780
Why?
Life Style
3
2022
85
0.760
Why?
Progestins
2
2019
10
0.750
Why?
Cryopreservation
2
2021
12
0.730
Why?
Ovarian Reserve
2
2019
9
0.670
Why?
Ultrasonography
6
2018
229
0.660
Why?
Gonadotropins
5
2020
22
0.630
Why?
Biomarkers
8
2022
738
0.610
Why?
Spermatozoa
4
2025
33
0.610
Why?
Estradiol
4
2014
175
0.600
Why?
Chorionic Gonadotropin
3
2021
22
0.560
Why?
Gonadal Steroid Hormones
1
2016
24
0.530
Why?
Pregnancy Outcome
6
2021
130
0.530
Why?
Obesity
6
2022
654
0.530
Why?
Clomiphene
5
2021
11
0.510
Why?
Sperm Count
4
2025
17
0.500
Why?
Premenopause
1
2015
20
0.500
Why?
Off-Label Use
1
2015
6
0.480
Why?
Drug Labeling
1
2015
4
0.480
Why?
Endometriosis
1
2015
19
0.470
Why?
Birth Rate
1
2014
11
0.470
Why?
Drug Prescriptions
1
2015
43
0.470
Why?
Follicle Stimulating Hormone
4
2012
71
0.470
Why?
Ovariectomy
2
2012
53
0.440
Why?
Primary Ovarian Insufficiency
1
2013
6
0.440
Why?
Semen
3
2022
27
0.420
Why?
Evidence-Based Medicine
1
2013
141
0.400
Why?
Treatment Outcome
11
2022
2286
0.400
Why?
Abortion, Spontaneous
3
2021
16
0.390
Why?
Male
20
2025
13040
0.390
Why?
Young Adult
15
2022
2633
0.370
Why?
Pregnancy, Multiple
3
2015
8
0.370
Why?
Insemination
2
2020
6
0.350
Why?
Methotrexate
2
2021
32
0.340
Why?
Sperm Motility
3
2025
15
0.330
Why?
Randomized Controlled Trials as Topic
7
2022
365
0.330
Why?
5'-Nucleotidase
4
2002
13
0.320
Why?
Body Mass Index
5
2022
387
0.320
Why?
Antioxidants
2
2021
221
0.310
Why?
Inhibins
4
2012
8
0.300
Why?
Follicular Phase
2
2004
8
0.300
Why?
Middle Aged
10
2019
6913
0.290
Why?
Adolescent
13
2021
2993
0.290
Why?
United States
8
2022
2062
0.270
Why?
Triazoles
2
2015
15
0.250
Why?
Nitriles
2
2015
32
0.240
Why?
Patient Selection
2
2015
143
0.240
Why?
Risk Factors
7
2022
2038
0.240
Why?
Retrospective Studies
6
2025
2453
0.230
Why?
Triglycerides
2
2022
121
0.230
Why?
Infant, Newborn
4
2020
846
0.220
Why?
Galanin-Like Peptide
1
2003
1
0.220
Why?
Sympathetic Nervous System
1
2003
67
0.210
Why?
Metabolic Syndrome
2
2021
78
0.200
Why?
Insemination, Artificial, Homologous
2
2020
4
0.200
Why?
Dilatation and Curettage
2
2021
4
0.200
Why?
Proprotein Convertase 9
1
2022
3
0.200
Why?
Androgens
2
2020
47
0.200
Why?
Chi-Square Distribution
4
2015
144
0.200
Why?
Subtilisins
1
2022
6
0.200
Why?
Semen Analysis
4
2025
13
0.200
Why?
Cholesterol, LDL
1
2022
64
0.200
Why?
Testosterone
2
2019
70
0.190
Why?
Predictive Value of Tests
3
2016
472
0.190
Why?
Decision Support Techniques
1
2022
49
0.190
Why?
Lipoproteins
1
2022
95
0.190
Why?
Cohort Studies
5
2022
862
0.190
Why?
Vitamins
1
2021
22
0.190
Why?
Hydrocortisone
1
2022
88
0.190
Why?
Anti-Mullerian Hormone
2
2012
6
0.190
Why?
Precision Medicine
1
2022
70
0.180
Why?
Sleep
1
2021
101
0.180
Why?
Cholesterol
1
2022
182
0.180
Why?
Endometrium
1
2020
38
0.180
Why?
Ethiodized Oil
1
2020
2
0.180
Why?
Fertility Agents
1
2020
2
0.170
Why?
Surveys and Questionnaires
3
2021
934
0.170
Why?
Gonadotropin-Releasing Hormone
2
2015
37
0.170
Why?
Fertilization
2
2022
9
0.170
Why?
Child Behavior
1
2020
26
0.170
Why?
Child
3
2020
2158
0.170
Why?
Pregnancy Complications
1
2021
108
0.170
Why?
BRCA2 Protein
1
2019
18
0.170
Why?
Reproductive Medicine
2
2018
4
0.170
Why?
Metformin
1
2020
34
0.170
Why?
BRCA1 Protein
1
2019
23
0.170
Why?
Contrast Media
1
2020
94
0.160
Why?
Fallopian Tubes
2
2018
14
0.160
Why?
Erectile Dysfunction
1
2019
13
0.160
Why?
Water
1
2020
131
0.160
Why?
Ovulation
2
2018
28
0.160
Why?
Spermatogenesis
1
2019
11
0.160
Why?
Leiomyoma
1
2019
9
0.160
Why?
Child Development
1
2020
72
0.160
Why?
Endocrinologists
1
2019
2
0.160
Why?
National Institute of Child Health and Human Development (U.S.)
1
2018
2
0.160
Why?
Ethics Committees, Research
1
2018
6
0.160
Why?
Clinical Protocols
1
2018
45
0.150
Why?
Pre-Eclampsia
1
2018
48
0.150
Why?
Gynecology
1
2019
56
0.150
Why?
Menstrual Cycle
2
2012
23
0.150
Why?
Antidepressive Agents
1
2018
29
0.150
Why?
Reproducibility of Results
3
2010
751
0.150
Why?
Vitamin D
1
2018
48
0.150
Why?
Transcriptome
1
2019
205
0.150
Why?
Quality of Life
2
2019
468
0.150
Why?
Vitamin D Deficiency
1
2018
31
0.150
Why?
Diabetes, Gestational
1
2018
67
0.140
Why?
Sexual Dysfunction, Physiological
1
2017
6
0.140
Why?
Depression
1
2019
212
0.140
Why?
Oxidative Stress
1
2021
635
0.140
Why?
Depressive Disorder, Major
1
2018
126
0.130
Why?
Alcohol Drinking
2
2015
162
0.130
Why?
Contraceptives, Oral
1
2015
23
0.130
Why?
Chlamydia trachomatis
1
2015
16
0.130
Why?
Chlamydia Infections
1
2015
17
0.130
Why?
Multicenter Studies as Topic
3
2021
43
0.130
Why?
Patient Dropouts
1
2015
6
0.130
Why?
Cross-Sectional Studies
2
2017
931
0.120
Why?
Promoter Regions, Genetic
2
2002
331
0.120
Why?
Ovulation Inhibition
1
2015
1
0.120
Why?
Contraceptives, Oral, Hormonal
1
2015
9
0.120
Why?
Referral and Consultation
1
2015
94
0.120
Why?
Organ Size
2
2020
85
0.120
Why?
Antibodies, Bacterial
1
2015
100
0.120
Why?
United States Food and Drug Administration
1
2015
43
0.120
Why?
Time Factors
2
2018
1571
0.120
Why?
Models, Theoretical
1
2015
130
0.110
Why?
Case-Control Studies
3
2018
707
0.110
Why?
Regulatory Sequences, Nucleic Acid
1
1994
25
0.110
Why?
Severity of Illness Index
2
2013
446
0.110
Why?
Analysis of Variance
1
2014
389
0.110
Why?
Immunoglobulin G
1
2015
267
0.110
Why?
Androgen-Insensitivity Syndrome
1
2013
4
0.110
Why?
Protein Biosynthesis
1
1994
109
0.110
Why?
Preoperative Care
1
2013
76
0.100
Why?
Research Design
2
2019
175
0.100
Why?
Prevalence
3
2019
478
0.100
Why?
Risk Assessment
4
2022
598
0.100
Why?
Congresses as Topic
1
2012
32
0.100
Why?
Smoking
1
2015
466
0.090
Why?
Infant
2
2020
965
0.090
Why?
Down-Regulation
2
2019
198
0.090
Why?
Child, Preschool
2
2020
1102
0.090
Why?
Follow-Up Studies
3
2020
989
0.080
Why?
RNA, Messenger
3
2003
648
0.080
Why?
Multivariate Analysis
3
2015
300
0.080
Why?
Recombinant Proteins
2
2004
408
0.080
Why?
Magnetic Resonance Imaging
1
2013
811
0.080
Why?
Double-Blind Method
2
2020
405
0.080
Why?
Anthropometry
1
2008
93
0.070
Why?
Hyperandrogenism
2
2018
11
0.070
Why?
Observer Variation
2
2007
43
0.070
Why?
Hydronephrosis
1
2007
11
0.070
Why?
Ureteral Obstruction
1
2007
12
0.070
Why?
Base Sequence
4
1995
575
0.070
Why?
Animals
4
2013
10093
0.070
Why?
Stents
1
2007
116
0.060
Why?
Cloning, Molecular
3
1995
205
0.060
Why?
Molecular Sequence Data
4
1995
1041
0.060
Why?
Prognosis
2
2020
763
0.060
Why?
Image Processing, Computer-Assisted
1
2007
247
0.060
Why?
Phenotype
2
2018
668
0.060
Why?
Odds Ratio
2
2015
230
0.060
Why?
Inhibin-beta Subunits
1
2004
3
0.060
Why?
Activins
1
2004
4
0.060
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?
Uncoupling Protein 1
1
2003
14
0.050
Why?
Pituitary Gland
1
2003
53
0.050
Why?
Academic Medical Centers
2
2015
73
0.050
Why?
Ion Channels
1
2003
23
0.050
Why?
Adipose Tissue, Brown
1
2003
14
0.050
Why?
Pro-Opiomelanocortin
1
2003
14
0.050
Why?
Reference Values
1
2003
199
0.050
Why?
Eating
1
2003
70
0.050
Why?
Leptin
1
2003
67
0.050
Why?
Drug Administration Schedule
1
2003
218
0.050
Why?
Mitochondrial Proteins
1
2003
73
0.050
Why?
Logistic Models
2
2015
398
0.050
Why?
Body Weight
1
2003
247
0.050
Why?
alpha-Amylases
1
2022
2
0.050
Why?
Coitus
1
2022
14
0.050
Why?
Maternal Age
1
2022
25
0.050
Why?
Snoring
1
2021
8
0.050
Why?
Preconception Care
1
2022
17
0.050
Why?
Uterine Hemorrhage
1
2021
9
0.050
Why?
Carrier Proteins
1
2003
246
0.050
Why?
Clinical Decision-Making
1
2022
61
0.050
Why?
Intestinal Mucosa
1
2002
186
0.050
Why?
Ultrasonography, Prenatal
1
2021
36
0.050
Why?
Weight Loss
1
2022
73
0.050
Why?
Sleep Apnea, Obstructive
1
2021
38
0.050
Why?
Immunohistochemistry
2
2019
455
0.050
Why?
Sleep Wake Disorders
1
2021
65
0.050
Why?
Patient Satisfaction
1
2021
90
0.040
Why?
Combined Modality Therapy
1
2021
291
0.040
Why?
Nuclear Proteins
1
2002
245
0.040
Why?
Family Characteristics
1
2020
46
0.040
Why?
Gestures
1
2020
1
0.040
Why?
Rats
1
2003
1554
0.040
Why?
Heterozygote
1
2019
64
0.040
Why?
Germ-Line Mutation
1
2019
29
0.040
Why?
Membrane Proteins
1
2003
469
0.040
Why?
Weight Gain
1
2020
73
0.040
Why?
Observational Studies as Topic
1
2019
53
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
76
0.040
Why?
Hypoglycemic Agents
1
2020
106
0.040
Why?
DNA-Binding Proteins
1
2002
481
0.040
Why?
Transcription Factors
1
2002
512
0.040
Why?
Mice, Inbred C57BL
1
2003
1498
0.040
Why?
Pilot Projects
1
2020
397
0.040
Why?
Birth Weight
1
2018
63
0.040
Why?
Registries
1
2020
382
0.040
Why?
Asian Americans
1
2018
40
0.040
Why?
DNA Methylation
1
2019
149
0.040
Why?
Age Factors
1
2020
725
0.040
Why?
Exercise
1
2022
469
0.040
Why?
Mice
3
2003
4478
0.040
Why?
Diagnosis, Differential
1
2018
367
0.030
Why?
Sex Hormone-Binding Globulin
1
2017
4
0.030
Why?
Cognition
1
2020
299
0.030
Why?
Hirsutism
1
2017
17
0.030
Why?
Waist Circumference
1
2017
18
0.030
Why?
Hypertriglyceridemia
1
2017
8
0.030
Why?
Laparoscopy
1
2018
143
0.030
Why?
Transcription, Genetic
2
1995
401
0.030
Why?
Adenosine Deaminase
1
1995
5
0.030
Why?
Sequence Deletion
1
1995
65
0.030
Why?
Serologic Tests
1
2015
19
0.030
Why?
Receptors, Purinergic P1
1
1995
2
0.030
Why?
Base Composition
1
1995
108
0.030
Why?
African Americans
1
2018
350
0.030
Why?
Gene Expression Regulation, Enzymologic
1
1995
93
0.030
Why?
Blood Glucose
1
2017
307
0.030
Why?
Linear Models
1
2015
201
0.030
Why?
Enzyme-Linked Immunosorbent Assay
1
2015
253
0.030
Why?
Binding Sites
1
1995
342
0.030
Why?
Drug Therapy, Combination
1
2015
205
0.030
Why?
Antibodies
1
1995
124
0.030
Why?
Internet
1
2015
122
0.030
Why?
RNA Caps
1
1994
2
0.030
Why?
Restriction Mapping
1
1994
20
0.030
Why?
Genomic Library
1
1994
10
0.030
Why?
Gene Amplification
1
1994
22
0.030
Why?
Orchiectomy
1
2013
12
0.030
Why?
Epididymis
1
2013
8
0.030
Why?
Indians, North American
1
2018
518
0.030
Why?
Placenta
1
1994
74
0.030
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
42
0.020
Why?
Abdominal Pain
1
2007
34
0.020
Why?
Emergency Service, Hospital
1
2007
117
0.020
Why?
Sequence Homology, Amino Acid
2
1995
130
0.010
Why?
Luteinizing Hormone
1
2004
57
0.010
Why?
Amino Acid Sequence
2
1995
679
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
59
0.010
Why?
Cell Hypoxia
1
2002
35
0.010
Why?
Adenosine Triphosphatases
1
2002
49
0.010
Why?
Hypoxia-Inducible Factor 1, alpha Subunit
1
2002
57
0.010
Why?
Antigens, CD
1
2002
134
0.010
Why?
Cells, Cultured
1
2002
978
0.010
Why?
Gene Expression Regulation
1
2002
626
0.010
Why?
Chickens
1
1995
59
0.010
Why?
Antibody Formation
1
1995
75
0.010
Why?
DNA Primers
1
1995
143
0.010
Why?
Mice, Inbred BALB C
1
1995
264
0.010
Why?
Ribonucleases
1
1993
9
0.010
Why?
Peptide Fragments
1
1995
200
0.010
Why?
Organ Specificity
1
1993
81
0.010
Why?
Blotting, Western
1
1995
506
0.010
Why?
Polymerase Chain Reaction
1
1993
262
0.010
Why?
DNA
1
1993
365
0.010
Why?
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