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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
3.870
Why?
Infertility
10
2022
35
3.600
Why?
Ovulation Induction
14
2022
34
2.930
Why?
Ovarian Follicle
10
2019
84
2.510
Why?
Live Birth
14
2021
40
2.390
Why?
Insemination, Artificial
9
2025
27
1.780
Why?
Polycystic Ovary Syndrome
14
2022
65
1.670
Why?
Pregnancy
33
2025
1219
1.580
Why?
Infertility, Male
8
2022
23
1.550
Why?
Aging
11
2019
979
1.250
Why?
Pregnancy Rate
17
2025
49
1.240
Why?
Watchful Waiting
4
2022
18
1.240
Why?
Female
59
2025
15472
1.210
Why?
Fertility
8
2022
60
1.190
Why?
Fertility Agents, Female
8
2022
15
1.180
Why?
Luteal Phase
2
2019
7
1.180
Why?
Progesterone
3
2019
129
1.120
Why?
Pregnancy, Ectopic
4
2021
11
1.090
Why?
Abortifacient Agents, Nonsteroidal
3
2021
5
1.060
Why?
Reproduction
4
2012
64
1.040
Why?
Humans
67
2025
28585
0.950
Why?
Adult
44
2025
7922
0.920
Why?
Ovary
3
2013
71
0.900
Why?
Reproductive Techniques, Assisted
5
2021
17
0.880
Why?
Hysterosalpingography
2
2020
4
0.810
Why?
Embryo Transfer
3
2021
13
0.800
Why?
Fertilization in Vitro
6
2021
24
0.780
Why?
Proprotein Convertases
1
2022
12
0.750
Why?
Models, Biological
3
2014
468
0.750
Why?
Prospective Studies
14
2022
1272
0.750
Why?
Insulin Resistance
3
2022
176
0.740
Why?
Life Style
3
2022
90
0.720
Why?
Progestins
2
2019
12
0.710
Why?
Cryopreservation
2
2021
13
0.690
Why?
Ovarian Reserve
2
2019
9
0.640
Why?
Ultrasonography
6
2018
241
0.630
Why?
Gonadotropins
5
2020
22
0.600
Why?
Spermatozoa
4
2025
34
0.580
Why?
Biomarkers
8
2022
770
0.580
Why?
Estradiol
4
2014
175
0.570
Why?
Chorionic Gonadotropin
3
2021
22
0.530
Why?
Gonadal Steroid Hormones
1
2016
24
0.510
Why?
Pregnancy Outcome
6
2021
131
0.510
Why?
Obesity
6
2022
675
0.500
Why?
Clomiphene
5
2021
11
0.490
Why?
Sperm Count
4
2025
17
0.480
Why?
Premenopause
1
2015
20
0.470
Why?
Off-Label Use
1
2015
6
0.460
Why?
Drug Labeling
1
2015
4
0.460
Why?
Endometriosis
1
2015
19
0.450
Why?
Birth Rate
1
2014
11
0.450
Why?
Drug Prescriptions
1
2015
46
0.450
Why?
Follicle Stimulating Hormone
4
2012
71
0.440
Why?
Ovariectomy
2
2012
53
0.420
Why?
Primary Ovarian Insufficiency
1
2013
6
0.420
Why?
Semen
3
2022
29
0.400
Why?
Evidence-Based Medicine
1
2013
146
0.380
Why?
Treatment Outcome
11
2022
2402
0.380
Why?
Abortion, Spontaneous
3
2021
17
0.370
Why?
Male
20
2025
13772
0.360
Why?
Pregnancy, Multiple
3
2015
8
0.350
Why?
Young Adult
15
2022
2804
0.350
Why?
Insemination
2
2020
6
0.330
Why?
Methotrexate
2
2021
36
0.320
Why?
Sperm Motility
3
2025
16
0.310
Why?
Randomized Controlled Trials as Topic
7
2022
389
0.310
Why?
5'-Nucleotidase
4
2002
13
0.300
Why?
Body Mass Index
5
2022
405
0.300
Why?
Antioxidants
2
2021
224
0.300
Why?
Inhibins
4
2012
8
0.290
Why?
Follicular Phase
2
2004
8
0.280
Why?
Middle Aged
10
2019
7310
0.270
Why?
Adolescent
13
2021
3165
0.270
Why?
United States
8
2022
2201
0.250
Why?
Triazoles
2
2015
16
0.230
Why?
Nitriles
2
2015
33
0.230
Why?
Patient Selection
2
2015
149
0.220
Why?
Risk Factors
7
2022
2111
0.220
Why?
Triglycerides
2
2022
123
0.220
Why?
Retrospective Studies
6
2025
2612
0.210
Why?
Galanin-Like Peptide
1
2003
1
0.210
Why?
Infant, Newborn
4
2020
899
0.210
Why?
Sympathetic Nervous System
1
2003
68
0.200
Why?
Insemination, Artificial, Homologous
2
2020
4
0.190
Why?
Metabolic Syndrome
2
2021
80
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
3
0.190
Why?
Subtilisins
1
2022
6
0.190
Why?
Semen Analysis
4
2025
13
0.190
Why?
Cholesterol, LDL
1
2022
64
0.190
Why?
Testosterone
2
2019
72
0.190
Why?
Predictive Value of Tests
3
2016
480
0.180
Why?
Decision Support Techniques
1
2022
50
0.180
Why?
Cohort Studies
5
2022
893
0.180
Why?
Lipoproteins
1
2022
99
0.180
Why?
Vitamins
1
2021
23
0.180
Why?
Hydrocortisone
1
2022
89
0.180
Why?
Anti-Mullerian Hormone
2
2012
6
0.180
Why?
Precision Medicine
1
2022
76
0.170
Why?
Sleep
1
2021
112
0.170
Why?
Cholesterol
1
2022
202
0.170
Why?
Endometrium
1
2020
39
0.170
Why?
Ethiodized Oil
1
2020
2
0.170
Why?
Fertility Agents
1
2020
2
0.170
Why?
Gonadotropin-Releasing Hormone
2
2015
37
0.160
Why?
Fertilization
2
2022
10
0.160
Why?
Surveys and Questionnaires
3
2021
994
0.160
Why?
Child Behavior
1
2020
28
0.160
Why?
Pregnancy Complications
1
2021
111
0.160
Why?
Child
3
2020
2271
0.160
Why?
BRCA2 Protein
1
2019
20
0.160
Why?
Reproductive Medicine
2
2018
4
0.160
Why?
BRCA1 Protein
1
2019
25
0.160
Why?
Metformin
1
2020
36
0.160
Why?
Contrast Media
1
2020
96
0.160
Why?
Fallopian Tubes
2
2018
15
0.160
Why?
Erectile Dysfunction
1
2019
15
0.160
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
78
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
0.150
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
782
0.140
Why?
Vitamin D
1
2018
51
0.140
Why?
Vitamin D Deficiency
1
2018
31
0.140
Why?
Transcriptome
1
2019
214
0.140
Why?
Quality of Life
2
2019
504
0.140
Why?
Diabetes, Gestational
1
2018
68
0.140
Why?
Sexual Dysfunction, Physiological
1
2017
6
0.130
Why?
Depression
1
2019
222
0.130
Why?
Oxidative Stress
1
2021
671
0.130
Why?
Depressive Disorder, Major
1
2018
127
0.130
Why?
Alcohol Drinking
2
2015
175
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
47
0.120
Why?
Promoter Regions, Genetic
2
2002
344
0.120
Why?
Cross-Sectional Studies
2
2017
988
0.120
Why?
Ovulation Inhibition
1
2015
1
0.120
Why?
Contraceptives, Oral, Hormonal
1
2015
9
0.110
Why?
Referral and Consultation
1
2015
98
0.110
Why?
Organ Size
2
2020
88
0.110
Why?
Antibodies, Bacterial
1
2015
103
0.110
Why?
United States Food and Drug Administration
1
2015
45
0.110
Why?
Time Factors
2
2018
1600
0.110
Why?
Models, Theoretical
1
2015
134
0.110
Why?
Case-Control Studies
3
2018
732
0.110
Why?
Regulatory Sequences, Nucleic Acid
1
1994
26
0.110
Why?
Severity of Illness Index
2
2013
461
0.110
Why?
Analysis of Variance
1
2014
391
0.110
Why?
Immunoglobulin G
1
2015
272
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
185
0.100
Why?
Prevalence
3
2019
510
0.100
Why?
Risk Assessment
4
2022
622
0.100
Why?
Congresses as Topic
1
2012
35
0.090
Why?
Smoking
1
2015
476
0.090
Why?
Down-Regulation
2
2019
200
0.090
Why?
Infant
2
2020
1019
0.090
Why?
Child, Preschool
2
2020
1167
0.080
Why?
Follow-Up Studies
3
2020
1026
0.080
Why?
RNA, Messenger
3
2003
667
0.080
Why?
Multivariate Analysis
3
2015
302
0.080
Why?
Recombinant Proteins
2
2004
415
0.070
Why?
Magnetic Resonance Imaging
1
2013
834
0.070
Why?
Double-Blind Method
2
2020
421
0.070
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
588
0.060
Why?
Animals
4
2013
10583
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
807
0.060
Why?
Image Processing, Computer-Assisted
1
2007
253
0.060
Why?
Phenotype
2
2018
682
0.060
Why?
Odds Ratio
2
2015
236
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?
Uncoupling Protein 1
1
2003
14
0.050
Why?
Pituitary Gland
1
2003
53
0.050
Why?
Academic Medical Centers
2
2015
76
0.050
Why?
Adipose Tissue, Brown
1
2003
14
0.050
Why?
Ion Channels
1
2003
28
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
224
0.050
Why?
Mitochondrial Proteins
1
2003
80
0.050
Why?
Logistic Models
2
2015
409
0.050
Why?
Body Weight
1
2003
250
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
0.040
Why?
Carrier Proteins
1
2003
252
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
197
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
302
0.040
Why?
Family Characteristics
1
2020
47
0.040
Why?
Gestures
1
2020
1
0.040
Why?
Rats
1
2003
1587
0.040
Why?
Heterozygote
1
2019
69
0.040
Why?
Germ-Line Mutation
1
2019
31
0.040
Why?
Weight Gain
1
2020
75
0.040
Why?
Observational Studies as Topic
1
2019
54
0.040
Why?
RNA Processing, Post-Transcriptional
1
2019
20
0.040
Why?
Membrane Proteins
1
2003
485
0.040
Why?
Chromatin Assembly and Disassembly
1
2019
20
0.040
Why?
Gene Regulatory Networks
1
2019
78
0.040
Why?
DNA-Binding Proteins
1
2002
490
0.040
Why?
Hypoglycemic Agents
1
2020
109
0.040
Why?
Transcription Factors
1
2002
523
0.040
Why?
Birth Weight
1
2018
63
0.040
Why?
Mice, Inbred C57BL
1
2003
1602
0.040
Why?
Pilot Projects
1
2020
458
0.040
Why?
Registries
1
2020
393
0.040
Why?
DNA Methylation
1
2019
152
0.030
Why?
Asian Americans
1
2018
40
0.030
Why?
Age Factors
1
2020
734
0.030
Why?
Exercise
1
2022
493
0.030
Why?
Diagnosis, Differential
1
2018
378
0.030
Why?
Sex Hormone-Binding Globulin
1
2017
4
0.030
Why?
Mice
3
2003
4735
0.030
Why?
Hirsutism
1
2017
18
0.030
Why?
Waist Circumference
1
2017
20
0.030
Why?
Hypertriglyceridemia
1
2017
8
0.030
Why?
Cognition
1
2020
327
0.030
Why?
Transcription, Genetic
2
1995
404
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
352
0.030
Why?
Base Composition
1
1995
110
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
202
0.030
Why?
Enzyme-Linked Immunosorbent Assay
1
2015
257
0.030
Why?
Drug Therapy, Combination
1
2015
208
0.030
Why?
Binding Sites
1
1995
354
0.030
Why?
Antibodies
1
1995
124
0.030
Why?
Internet
1
2015
126
0.030
Why?
RNA Caps
1
1994
2
0.030
Why?
Genomic Library
1
1994
10
0.030
Why?
Restriction Mapping
1
1994
23
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?
Placenta
1
1994
78
0.030
Why?
Indians, North American
1
2018
534
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
121
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
695
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
1009
0.010
Why?
Gene Expression Regulation
1
2002
633
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
375
0.010
Why?
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