Leading IVF Doctors & Specialists
Find the right reproductive specialist
Leading IVF Doctors & Specialists · Inclusion criteria: listed specialists practice at credential-verified, accredited fertility centers. Education, board certification (e.g., ABOG, reproductive endocrinology & infertility fellowship) and years of experience are verified against official hospital records and public licensure registries; patient reviews are manually verified before publication. How we verify doctors
Dr. Giannina Karangos
Reproductive Medicine Specialist
Dr. Giannina Karangos is the medical director of Oak Clinic Ginza since April 2025. Trained at Hyogo College of Medicine's graduate school with a Peruvian medical degree, she researches reproductive immunology and gonadotropin protocols, and consults in Japanese and English.
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Japan 
Dr. Karen L. Lee, MD
Reproductive Endocrinologist
Dr. Karen L. Lee joined Dallas-Fort Worth Fertility Associates in August 2005 after serving as a clinical assistant professor in the reproductive endocrinology and infertility division at Duke University Medical Center. She is board-certified in reproductive endocrinology and infertility, holds an MD from Harvard Medical School, and practices IVF, ICSI and reproductive surgery at the Glen Lakes office in Dallas.
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United States 
Kassie Bollig, M.D., FACOG, M.S.C.E.
Reproductive Endocrinologist
Dr. Kassie Bollig is a reproductive endocrinologist at RMA New Jersey in Basking Ridge who also performs minimally invasive reproductive surgery. She trained at the University of Pennsylvania for her REI fellowship and earned a Master of Science in Clinical Epidemiology there, and researches ovarian reserve in Turner syndrome, hCG algorithms for predicting pregnancy location and viability, and preconception cardiovascular health.
United States 
Kate Odenwald, ACNP-BC
Adult-Gerontology Acute Care Nurse Practitioner
Kate Odenwald, ACNP-BC joined CCRM Fertility of Lone Tree in 2026 with 13 years in reproductive health nursing, including work in hospital operating rooms with general surgeons. As an acute-care nurse practitioner she handles cycle visits, IUIs, endometrial biopsies and the physical assessments that open an IVF workup.
United States 
Katherine E. McDaniel, MD, FACOG
Doctor of Medicine
Katherine McDaniel, MD, FACOG is a reproductive endocrinology specialist at HRC Fertility Pasadena, an assistant professor at USC and its Head of Oncofertility. A Boston College history graduate who spent five years in management consulting before UC Irvine medical school, she researches fertility cost transparency, preimplantation genetic testing and disorders of sexual development.
United States 
Katherine McKnight, MD
Reproductive Endocrinologist
Dr. Katherine McKnight has practiced reproductive endocrinology at CCRM Fertility of Houston since 2012 and is listed by the practice as its practice director. Trained at the University of Alabama at Birmingham, she handles recurrent pregnancy loss, primary ovarian insufficiency, PCOS and hysteroscopic surgery, and holds clinic at the Main Center and Texas Medical Center.
United States 
Katherine VanHise, MD
Reproductive Endocrinologist
Katherine VanHise is a reproductive endocrinologist at HRC Fertility Beverly Hills working at the intersection of the immune system and fertility. She focuses on reproductive immunology, PCOS, and racial disparities in fertility care.
United States 
Kathleen E. O'Neill, MD, MTR
Reproductive Endocrinologist
Kathleen O'Neill is co-principal investigator of the UNTIL uterus transplant trial, one of the first US studies offering a transplanted uterus to patients with no functioning one, and a founding member of the national uterus transplant group. She is an assistant professor at Penn, NIH-funded in oncofertility and uterus transplant research, and sees patients in English and Spanish.
United States 
Kathleen M. Brennan, MD
Reproductive Endocrinologist
Dr. Kathleen M. Brennan is a reproductive endocrinologist trained end to end at UCLA and board-certified in Obstetrics and Gynecology and in Reproductive Endocrinology and Infertility. Her focus areas include endometriosis, congenital uterine anomalies, PCOS and recurrent pregnancy loss.
United States 
Kathryn C. Calhoun, MD, FACOG
Reproductive Endocrinologist
Kathryn C. Calhoun, MD, FACOG trained at UNC and Penn before joining ACRM in 2012. She covers IVF, recurrent pregnancy loss, male factor infertility, ovarian aging and reproductive surgery, and is listed as a managing partner of the practice.
United States 
Kathryn C. Humm, M.D.
Reproductive Endocrinologist
Dr. Kathryn C. Humm has published on how race and ethnicity affect IVF outcomes, on preimplantation genetic testing and on IVF results generally. She spent seven years treating patients and teaching residents at George Washington University before joining Shady Grove Fertility, and sees patients in Rockville, Maryland and at the Sibley campus in Washington, D.C.
United States 
Katie Donnelly, CNP
Adult-Gerontology Acute Care Nurse Practitioner
Katie Donnelly, CNP is an adult-gerontology acute care nurse practitioner with seven years in reproductive endocrinology and fertility care at Cleveland Clinic Fertility Center in Ohio, working at both the Beachwood Family Health and Surgery Center and the Richard E. Jacobs Health Center in Avon. She holds a master's degree from Kent State University and is an active member of the American Society for Reproductive Medicine.
United States Showing 577-587 of 963
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