Our Team

At the Johns Hopkins Fertility Center, you are cared for by a team of experts who bring compassion, experience, and advanced science to every step of your journey. From your first consultation through treatment, each person you meet has a role in supporting your path to parenthood.

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The Johns Hopkins Standard of Care

At Johns Hopkins, patients receive the highest level of care. Our experts undergo advanced training, board certification, and ongoing examinations to remain at the forefront of reproductive endocrinology, gynecology, and obstetrics. This commitment means your care is guided by leaders who set the standard for excellence in fertility medicine.


Reproductive Endocrinologists

Our physicians are subspecialty-trained leaders in reproductive endocrinology and infertility. Each physician brings unique expertise in patient care, research, and innovation. You can learn more about their approaches and areas of focus through their individual profiles.

  • Valerie Lynn Baker, MD MPP

    • Director, Division of Reproductive Endocrinology and Infertility
    • Professor of Gynecology and Obstetrics

    Expertise: Reproductive Endocrinology and Infertility, Gynecology

  • Katie E. Cameron, MD MBE

    • Assistant Professor of Gynecology and Obstetrics

    Expertise: Gender Affirming Care, Gynecology, Reproductive Endocrinology and Infertility

  • Kamaria C. Cayton Vaught, MD

    • Assistant Professor of Gynecology and Obstetrics

    Expertise: Reproductive Endocrinology and Infertility, Gynecology

  • Endrika Leon Hinton, MD

    • Assistant Professor of Gynecology and Obstetrics

    Expertise: Gynecology, Reproductive Endocrinology and Infertility

  • Pardis Hosseinzadeh, MD MSc

    • Assistant Professor of Gynecology and Obstetrics

    Expertise: Gynecology, Reproductive Endocrinology and Infertility

  • Vasiliki Moragianni, MD MSc

    • Medical Director, Fertility Center
    • Assistant Professor of Gynecology and Obstetrics

    Expertise: Reproductive Endocrinology and Infertility, Gynecology

  • James Segars, MD

    • Director, Division of Reproductive Science and Women’s Health Research
    • Professor of Gynecology and Obstetrics

    Expertise: Reproductive Endocrinology and Infertility, Gynecology

  • Howard A. Zacur, MD

    • Professor of Gynecology and Obstetrics

    Expertise: Gynecology, Reproductive Endocrinology and Infertility

Fellows

Fellows are physicians completing advanced training in reproductive endocrinology. They care for patients in close partnership with faculty and contribute to advancing the science of fertility medicine. Their presence reflects Johns Hopkins’ role as a teaching institution committed to training the next generation of specialists.

  • Bronwyn Stidley Bedrick, MD MSCI

    Expertise: Obstetrics and Gynecology

    Primary Location: Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville, Lutherville, MD

  • Anita Monique Madison, MD MPH

    Expertise: Obstetrics and Gynecology

    Primary Location: Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville, Lutherville, MD

  • Alexis Hood, MD

    Expertise: Obstetrics and Gynecology, Reproductive Endocrinology and Infertility

    Primary Location: Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville, Lutherville, MD

  • Abigail L Combs, MD

    Expertise: Gynecology, Reproductive Endocrinology and Infertility

    Primary Location: Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville, Lutherville, MD

  • Janelle Mary Jackman, MBBS

    Expertise: Obstetrics and Gynecology

    Primary Location: Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville, Lutherville, MD

Reproductive Endocrinology and Infertility Nurse Practitioners

Our advanced practice providers work side by side with physicians to deliver personalized and continuous care. They perform consultations, answer patient questions, provide detailed treatment guidance, and help ensure every care plan runs smoothly. Their role bridges expertise and accessibility, giving patients another trusted provider throughout their journey.

  • Dana Gebran Aybout, CRNP

    Expertise: Gynecology, Reproductive Endocrinology and Infertility

    Primary Location: Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville, Lutherville, MD

  • Julie Luterzo, CRNP

    Expertise: Gynecology, Reproductive Endocrinology and Infertility

    Primary Location: Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville, Lutherville, MD

  • Stefanie Tyler, CRNP DNP

    Expertise: Reproductive Endocrinology and Infertility

    Primary Location: Johns Hopkins Health Care & Surgery Center - Green Spring Station, Lutherville, Lutherville, MD

IVF Nurses

IVF nurses are at the heart of patient care during fertility treatment. They coordinate complex treatment schedules, guide patients through medication protocols, monitor progress, and explain what to expect at each step. With clinical expertise and close communication, they ensure that patients feel prepared and supported throughout the process.

Laboratory Director

Our laboratory director oversees all laboratory operations, including embryo culture, genetic testing, and embryo transfer preparation. Their leadership ensures safety, precision, and consistency across every procedure performed in the laboratory. This role safeguards the scientific foundation of treatment while maintaining the highest standards of quality.

Mark Paul David Dow, PhD

  • REI Laboratory Director: Johns Hopkins Fertility Center

Andrology/Endocrine/Embryology Team

These highly specialized teams carry out the behind-the-scenes science that makes fertility treatment possible.

  • Andrology specialists prepare, analyze, and optimize sperm samples to support procedures such as IVF and IUI.
  • Endocrine staff perform essential hormone testing that informs treatment decisions and monitoring.
  • Embryologists culture embryos, perform advanced laboratory techniques, and carefully select embryos for transfer

Together, these experts apply advanced technology and meticulous care to give patients the best possible outcomes.

Financial Counselors

Our financial counselors partner with patients to make treatment planning clearer and less stressful. They explain insurance benefits, review out-of-pocket costs, discuss financing and payment options, and help patients choose the path that works best for them. Their guidance allows patients to make informed decisions and focus on treatment with confidence.

Fertility Center Managers

Fertility Center managers oversee the daily operations of the program and ensure every part of the patient experience is well-coordinated. They support physicians, nurses, and staff across departments while serving as a resource for patients who need help connecting with the right team. Their leadership keeps the center running efficiently and ensures patients experience seamless, responsive care.

Multidisciplinary Care Partners

We are proud to collaborate with our partners throughout Hopkins to bring our patients the best possible care and address the root cause of underlying fertility issues. All of our patients can expect their fertility specialist to be at the head of their care, with access to additional care options from the following specialty areas as needed.

Multidisciplinary Care - Male Factor Infertility Specialists

Urologists

Amin Herati, MD

  • Director of Male Infertility and Men’s Health
  • Assistant Professor of Urology

Expertise: Urology

Michal Secker, FNP-C

Michal Secker FNP-C is a Nurse Practitioner at the James Buchanan Brady Urological Institute and works at the Johns Hopkins Hospital as well as the Greenspring Outpatient Center. She works collaboratively with Dr. Amin S. Herati, MD, the Director of Men's Health and Director of Male Infertility.
Michal Secker