Katherine Rotker, MD
Associate Professor of UrologyCards
About
Research
Publications
2025
(291) The Impact of the “Bent Carrot”: Google Search Trends on Peyronie’s Disease Increased Following the Introduction of Collagenase Clostridium Histolyticum Advertisement Campaign
Cahill E, Choksi A, Rotker K, Honig S. (291) The Impact of the “Bent Carrot”: Google Search Trends on Peyronie’s Disease Increased Following the Introduction of Collagenase Clostridium Histolyticum Advertisement Campaign. The Journal Of Sexual Medicine 2025, 22: qdaf320.287. DOI: 10.1093/jsxmed/qdaf320.287.Peer-Reviewed Original ResearchPrevalence of PDEstimated prevalence of PDEstimated prevalencePeyronie's diseaseReluctance of menFood and Drug AdministrationLack of awarenessPatient embarrassmentRelative search volumeReport symptomsSeeking treatmentSearch termsSearch volumeInternet search enginesGoogle searchInternet search patternsProgressive conditionTreatment optionsXiaflexPeyronieTunica albuginea(429) Testosterone Use and Semen Quality in a Large Cohort of Men Seeking Fertility Evaluation
Cahill E, Nolte D, Morrison J, Andino J, Smith J, Honig S, Rotker K. (429) Testosterone Use and Semen Quality in a Large Cohort of Men Seeking Fertility Evaluation. The Journal Of Sexual Medicine 2025, 22: qdaf320.423. DOI: 10.1093/jsxmed/qdaf320.423.Peer-Reviewed Original ResearchTotal motile countTestosterone useMotile countTestosterone usersSemen qualityExogenous testosteroneFertility evaluationExogenous androgen therapyMultivariate logistic regression analysisRecovery of spermatogenesisExogenous testosterone useEndogenous testosterone productionCohort of menLogistic regression analysisNon-usersMultivariate logistic regression resultsSelf-reported reasonsAndrogen therapyChi-square testImpact of testosteroneSemen analysisPatient ageSperm countVasectomy reversalHome zip codeIP18-28 IS A FRESH SEMEN ANALYSIS NECESSARY FOR A POST VASECTOMY SEMEN ANALYSIS?: ASSESSMENT OF STABILITY OF SPERM CONCENTRATION OVER A 10-DAY TIME FRAME AS A MODEL FOR POST VASECTOMY SEMEN ANALYSIS USING THE FELLOW SYSTEM
McCahill E, Honig S, Reddy S, Fernandez A, Schroeder T, Kaur I, Chen E, Belarmino A, Mehta A, Civello D, Kenfield S, Nolte D, Smith J, Rotker K. IP18-28 IS A FRESH SEMEN ANALYSIS NECESSARY FOR A POST VASECTOMY SEMEN ANALYSIS?: ASSESSMENT OF STABILITY OF SPERM CONCENTRATION OVER A 10-DAY TIME FRAME AS A MODEL FOR POST VASECTOMY SEMEN ANALYSIS USING THE FELLOW SYSTEM. Journal Of Urology 2025, 213: e976. DOI: 10.1097/01.ju.0001110060.12139.1b.28.Peer-Reviewed Original ResearchIP18-29 MAIL-IN SEMEN ANALYSIS VS FRESH SAMPLE FOR POST-VASECTOMY SEMEN ANALYSIS (PVSA): IDENTIFYING AN EFFICIENT APPROACH TO ACHIEVING POST-VASECTOMY CLEARANCE
Cahill E, Honig S, Reddy S, Nolte D, Kenfield S, Belarmino A, Civello D, Smith J, Rotker K. IP18-29 MAIL-IN SEMEN ANALYSIS VS FRESH SAMPLE FOR POST-VASECTOMY SEMEN ANALYSIS (PVSA): IDENTIFYING AN EFFICIENT APPROACH TO ACHIEVING POST-VASECTOMY CLEARANCE. Journal Of Urology 2025, 213: e977. DOI: 10.1097/01.ju.0001110060.12139.1b.29.Peer-Reviewed Original ResearchPost-vasectomy semen analysis: what is the best protocol?
Cahill E, Rabil M, Rotker K, Honig S. Post-vasectomy semen analysis: what is the best protocol? International Journal Of Impotence Research 2025, 1-5. PMID: 40155486, DOI: 10.1038/s41443-025-01052-3.Peer-Reviewed Original ResearchPost-vasectomy semen analysisAmerican Urological AssociationNon-motile spermSemen analysisPatient complianceAmerican Urological Association guidelinesFactors associated with complianceInitial clearance rateUrological AssociationPermanent sterilizationPatientsClearance ratePatient embarrassmentPatient preferencesVasectomyAzoospermiaAt-home testingClearanceIncrease complianceAlternative optionEffective formComplianceContraceptionSpermatocelectomy with and without epididymectomy: retrospective experience at a single institution in patients not interested in fertility preservation
Cahill E, Choksi A, Reddy S, Heckscher D, Rotker K, Honig S. Spermatocelectomy with and without epididymectomy: retrospective experience at a single institution in patients not interested in fertility preservation. Canadian Journal Of Urology 2025, 32: 521-527. PMID: 41220363, DOI: 10.32604/cju.2025.064559.Peer-Reviewed Original ResearchConceptsRetrospective chart reviewRate of recurrenceRecurrence rateRe-interventionFertility preservationRetrospective chart review of patientsChart review of patientsMedian Follow-UpReview of patientsRe-ExcisionComplication ratePatient demographicsFollow-upSurgical proceduresSpermatocelectomyRandomized trialsSpermatoceleEpididymectomyRecurrencePatientsPatient satisfactionRetrospective experienceEpididymisOperating characteristicsPublished data
2024
POSTHUMOUS SPERM RETRIEVAL: SURVEY OF KNOWLEDGE OF INTENSIVE CARE UNIT PROVIDERS
Hayden C, Kong V, Honig S, Rotker K. POSTHUMOUS SPERM RETRIEVAL: SURVEY OF KNOWLEDGE OF INTENSIVE CARE UNIT PROVIDERS. Fertility And Sterility 2024, 122: e318. DOI: 10.1016/j.fertnstert.2024.07.965.Peer-Reviewed Original ResearchTRENDS IN POST VASECTOMY SEMEN ANALYSIS (PVSA) UTILIZATION PRE- AND POST-DOBBS V JACKSON: DATA FROM A LIBERAL-LEANING STATE
Ayaz A, Rotker K, Seli E, Honig S. TRENDS IN POST VASECTOMY SEMEN ANALYSIS (PVSA) UTILIZATION PRE- AND POST-DOBBS V JACKSON: DATA FROM A LIBERAL-LEANING STATE. Fertility And Sterility 2024, 122: e375-e376. DOI: 10.1016/j.fertnstert.2024.08.158.Peer-Reviewed Original Research(258) VASECTOMY ON TIKTOK: AN ANALYSIS OF THE TOP 50 VIDEOS
Cahill E, Reddy S, Rotker K, Honig S. (258) VASECTOMY ON TIKTOK: AN ANALYSIS OF THE TOP 50 VIDEOS. The Journal Of Sexual Medicine 2024, 21: qdae167.251. DOI: 10.1093/jsxmed/qdae167.251.Peer-Reviewed Original ResearchPost-vasectomy semen analysisPhysician usersVideo contentSource of videosVideo informationUser postsSocial mediaVideo lengthUsersVideoAnalyzed videosTikTok usersVideo engagementNon‐physician usersSemen analysisNon-physiciansSurgical proceduresCounseling patientsInformationPermanent sterilizationTikTokVasectomyEffective procedurePatientsTikTok videos(332) THE USE OF CHAPERONES FOR GENITOURINARY EXAMS: A SURVEY OF SOCIETY FOR THE STUDY OF MALE REPRODUCTION (SSMR) MEMBERS
Cahill E, Reddy S, Rotker K, Honig S. (332) THE USE OF CHAPERONES FOR GENITOURINARY EXAMS: A SURVEY OF SOCIETY FOR THE STUDY OF MALE REPRODUCTION (SSMR) MEMBERS. The Journal Of Sexual Medicine 2024, 21: qdae167.320. DOI: 10.1093/jsxmed/qdae167.320.Peer-Reviewed Original ResearchChaperone policyStandardized set of questionsChaperone useLength of timePatient-physician experienceClinical decision makingPhysician demographicsCurrent practicesProvider sentimentSociety for the Study of Male ReproductionMedicolegal protectionEmail distributionNational guidelinesNature of practiceMedical assistanceSexual medicineMedical chaperonesSets of questionsPractice policiesGenitourinary examinationVisitsReproductive urologistAssociated with reduced efficiencyProvidersPhysicians
Clinical Care
Overview
Katherine Rotker, MD, is a urologist who specializes in male fertility, sexual medicine and men’s health. She has advanced fellowship training in caring for men with erectile dysfunction, Peyronie’s disease (curvature of the penis) and low testosterone, among other conditions. She specializes in microsurgeries including varicocele repair and vasectomy reversal, as well as vasectomies and sperm retrieval. She also practices general urology, treating both men and women for a range of urological issues.
“I love working with people,” says Dr. Rotker, explaining why she became a urologist. “This is a field where you build long-term relationships with patients—and can follow some patients for decades,” she says. She works closely with her reproductive endocrinology colleagues, doctors who specialize in female fertility issues, to help couples navigate through what can be an emotional and difficult time, and spends time seeing patients at the Yale Fertility Center in Orange. “It is so fulfilling to help a couple achieve their goals in terms of pregnancy and intimacy.”
The majority of urologists today are men, but Dr. Rotker says she expects to see more women in the field as more pursue urology residencies. When asked if her gender is difficult for some patients, she states, “I think it is an asset.” “Some men say, ‘I was nervous to see a woman, but you always make me feel comfortable.’ I think there is something—gender aside—about finding the right doctor, one who knows how to make these difficult topics easier. I think it’s about truly listening and normalizing how common these conditions are, and letting patients know they are not alone and that there are options.”
In addition to caring for patients, Dr. Rotker has research interests in equity and gender within urology, and fertility topics such as sperm DNA fragmentation, which is related to genetic damage in the sperm. She has published on a variety of topics and has presented on a regional and national level.
Embarrassment can be a barrier to patients seeking care for many of these health issues, including erectile dysfunction and infertility. However, Dr. Rotker urges these men to talk to a doctor. “Men can feel alone when experiencing these health problems but they are common conditions and there is a lot we can offer both to address these concerns and improve their overall health."
Clinical Specialties
Fact Sheets
Vasectomy Reversal (Vasovasostomy)
Learn More on Yale MedicineErectile Dysfunction
Learn More on Yale MedicineVasectomy
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Board Certifications
Urology
- Certification Organization
- AB of Urology
- Original Certification Date
- 2019
Yale Medicine News
News
News
- November 20, 2025
Yale Urology Bulldog Debates' Surgical Skills Session for Trainees - In Photos
- July 29, 2025
Yale Urology Research [Q2: April-June 2025]
- May 12, 2025
15 Yale Urology Physicians Named "Top Doctors" for 2025
- April 15, 2025
Yale Urology Research [Q1: January-March 2025]
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