Karl R. Hansen

University of Oklahoma Health Sciences Center — United States

Medicine · Health Sciences

39h-index7.5kcitations220works0.32yr avg
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Research Topics

Ovarian function and disorders(91), Reproductive Biology and Fertility(71), Assisted Reproductive Technology and Twin Pregnancy(68), Reproductive Health and Technologies(45), Sperm and Testicular Function(16)

Publications220 total

SPERM VERY LONG CHAIN POLYUNSATURATED FATTY ACID (VLC-PUFA) CONCENTRATIONS: ASSOCIATIONS WITH FERTILITY STATUS AND SEMEN PARAMETERS
Fertility and Sterility·2025Open Access
VARIABILITY IN SPERM RECOVERY FOR INTRAUTERINE INSEMINATION PREPARATION AMONG ANDROLOGISTS DOES NOT INFLUENCE CLINICAL PREGNANCY RATES
Fertility and Sterility·2025Open Access
WEIGHT LOSS MEDICATION PRESCRIBING PRACTICES AMONG FERTILITY SPECIALISTS: A CROSS-SECTIONAL SURVEY STUDY
Fertility and Sterility·2025
The reproductive endocrinology and infertility subspecialist: definition, training, and scope of practice in the United States
Fertility and Sterility·2025
Improving access to care and delivery to marginalized and vulnerable populations: a committee opinion
Fertility and Sterility·2025· 1 cited
Cryptosporidium and Giardia infections of lambs in Southwest Norway: a longitudinal study
Acta veterinaria Scandinavica·2025· 1 citedOpen Access
O-127 The ULTRA trial: 12-month outcomes of transvaginal ULTRAsound-guided ovarian ablation in women with PCOS-related infertility
Human Reproduction·2025Open Access
Epilepsy Monitoring of Prospective Seizure Observations with Electronic Records (EMPOWER): An Observational Study Designed to Better Understand the Patient Journey (P5-9.012)
Neurology·2025
Low morphology does not lower success after intrauterine insemination unless inseminating motile sperm count is low
PLoS ONE·2025Open Access
Weight loss before conception: effects on atherogenic apolipoprotein lipid particles and endothelial function during pregnancy
F&S Reports·2025· 1 citedOpen Access
RISK FACTORS FOR PREGNANCY COMPLICATIONS IN COUPLES UNDERGOING INFERTILITY TREATMENT
Fertility and Sterility·2024
A COMPARISON OF SIDE EFFECTS ASSOCIATED WITH LETROZOLE “STAIR-STEP” VERSUS TRADITIONAL PROTOCOL IN PATIENTS WITH POLYCYSTIC OVARY SYNDROME
Fertility and Sterility·2024Open Access
P-698 The ULTRA trial: transvaginal ULTRAsound-guided ovarian ablation using May Health System in women with PCOS-related infertility: clinical and endocrine outcomes of first–in-human feasibility trial
Human Reproduction·2024Open Access
Effect of prematurely elevated late follicular progesterone on pregnancy outcomes following ovarian stimulation-intrauterine insemination for unexplained infertility: secondary analysis of the AMIGOS trial
Human Reproduction·2024· 1 citedOpen Access
High antimüllerian hormone level in oocyte donors: Is it a problem?
Fertility and Sterility·2023Open Access
RISK FACTORS FOR BIOCHEMICAL PREGNANCY LOSS IN COUPLES UNDERGOING INFERTILITY TREATMENT
Fertility and Sterility·2023Open Access
ASSOCIATION OF FOLLICULAR PHASE LENGTH (FPL) AND EARLY PREGNANCY LOSS (EPL) IN WOMEN WITH UNEXPLAINED INFERTILITY UNDERGOING OVARIAN STIMULATION WITH INTRAUTERINE INSEMINATION (OS-IUI) CYCLES
Fertility and Sterility·2023Open Access
THE ULTRA TRIAL: TRANSVAGINAL ULTRASOUND-GUIDED OVARIAN ABLATION USING THE MAY HEALTH SYSTEM IN WOMEN WITH POLYCYSTIC OVARY SYNDROME (PCOS)-RELATED INFERTILITY: UP TO TWELVE MONTHS FOLLOW UP
Fertility and Sterility·2023Open Access
Follicular phase length is not related to live birth outcome in women with unexplained infertility undergoing ovarian stimulation with intrauterine insemination cycles in a multicenter trial
F&S Reports·2023Open Access
Moderate and increased physical activity is not detrimental to live birth rates among women with unexplained infertility and obesity
F&S Reports·2023· 2 citedOpen Access
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Frequent Co-authors

Christos Coutifaris(20), Michael P. Diamond(18), Richard S. Legro(18), Heping Zhang(18), Nanette Santoro(16), Esther Eisenberg(15), Ruben Alvero(13), Gregory M. Christman(13), Anne Z. Steiner(11), Hao Huang(11), Alan S. Penzias(10), K. Bendikson(10), Tommaso Falcone(10), Robert W. Rebar(10), Richard H. Reindollar(10), Randal D. Robinson(10), Rebecca Usadi(10), Peter R. Casson(10), Stephen A. Krawetz(9), Jennifer Mersereau(8)