Mara Rosner, M.D., M.P.H.

Headshot of Mara Rosner
  • Assistant Professor of Gynecology and Obstetrics


Amniotic Band Syndrome (ABS), Congenital Diaphragmatic Hernia, EXIT Procedure, Fetal Cardiac Defects, Fetal Echocardiography, Fetal Hydrops, Fetal Surgery, Fetoscopy, Gynecology, High Risk OB, Intrauterine Growth Restriction, Lower Urinary Tract Obstruction (LUTO), Maternal and Fetal Medicine, Multiple Gestations, Obstetrics, Placental Dysfunction, Prenatal Ultrasound, Spina Bifida, Twin Anemia Polycythemia Sequence, Twin Reversed Arterial Perfusion, Twin-to-Twin Transfusion Syndrome more

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The Johns Hopkins Hospital

Appointment Phone: 410-502-6561
600 N. Wolfe Street
Baltimore, MD 21287 map


Dr. Mara Rosner is an assistant professor in the Department of Gynecology and Obstetrics and a member of the Johns Hopkins Center for Fetal Therapy. She has extensively trained in fetal medicine and fetal therapy. Her expertise includes management of complicated monochorionic twins, complex multiple gestations, high-risk pregnancies, and prenatal diagnosis and treatment.

Dr. Rosner completed her undergraduate training at the University of California at Los Angeles. She received concurrent degrees in medicine and in public health at the Tulane University School of Medicine and the Tulane School Public Health, respectfully. She completed residency in Obstetrics and Gynecology at Icahn School of Medicine at Mount Sinai in New York City. She then completed fellowships in Maternal-Fetal Medicine at Montefiore Medical Center and in Fetal Therapy at the Children’s Hospital of Philadelphia. Dr. Rosner is a fellow of the American Congress of Obstetricians and Gynecologists.

Prior to joining Johns Hopkins, Dr. Rosner was an Assistant Professor in Maternal-Fetal Medicine at Montefiore Medical Center and then at New York University where she focused her practice on prenatal diagnosis and fetal therapy.

Dr. Rosner’s research interests include prenatal diagnosis, management of fetal conditions, complicated twin gestations and placental disease. Dr. Rosner’s love of fetal therapy is an extension of her passion for maternal care and each woman’s individual autonomy surrounding their pregnancy. Her approach to patient care is to treat each patient as she would a close family member, to function not only as a source of knowledge and experience but also as their advocate to help patients arrive at a treatment plan that is most reflective of their personal values and goals. more


  • Assistant Professor of Gynecology and Obstetrics

Departments / Divisions



  • MD; Medicine; Tulane University School of Medicine (2003)


  • Obstetrics and Gynecology; Icahn School of Medicine at Mount Sinai (2007)


  • Children's Hospital of Philadelphia (2008)
  • Maternal and Fetal Medicine; Montefiore Medical Center (2012)

Board Certifications

  • American Board of Obstetrics and Gynecology (OB/GYN-Maternal Fetal Medicine) (2014)
  • American Board of Obstetrics and Gynecology (Obstetrics And Gynecology) (2009)

Research & Publications

Selected Publications

Gebb J, Dar P, Rosner M, Evans MI. Long-term neurologic outcomes after common fetal interventions. Am J Obstet Gynecol. 2015 Apr;212(4):527.e1-9.

Adler E, Madankumar R, Rosner M, Reznik S. Increased placental trophoblast inclusions in placenta accreta. Placenta. 2014 Dec;35(12):1075-8.

Rosner M, Dar P, Reimers L, McAndrew T, Gebb J. First trimester 3-D power Doppler of the uteroplacental circulation space and fetal growth restriction. Am J Obstet Gynecol. 2014 Nov;211(5):521.e1-8

Rosner M, Pergament E, Andriole S, Gebb J, Dar P, Evans MI. Detection of genetic abnormalities using CVS and FISH prior to fetal reduction in sonographicaly normal appearing fetuses. Prenat Diagn 2013 Oct;33(10);940-4.

Evans MI, Rosner M, Andriole S, Alkalay A, Gebb J, Britt DW. Evolution of gender options in multiple pregnancy management. Prenat Diagn. 2013 Oct;33(10).935-9.

Activities & Honors


  • Resident Research Day Award
  • Medical Student Teaching Award


  • Fellow at the American College of Obstetricians and Gynecologists
  • Member of the International Society of Ultrasound in Obstetrics and Gynecology


  • Member of the Society of Maternal and Fetal Medicine
  • Member of the American Institute of Ultrasound in Medicine

Videos & Media

Lectures and Presentations

  • Fetal Growth Estimation
    Fellow Lecture Series, Maternal Fetal Medicine Fellow Lecture Series, New York City, New York
    New York University
  • Fetal Echocardiography
    Fellow Lecture Series, Maternal Fetal Medicine Fellow Lecture Series, New York City, New York
    New York University
  • Isoimmunization, percutaneous umbilical blood sampling and fetal transfusion
    Resident Lecture Series, Maternal Fetal Medicine Resident Lecture Series, New York City, New York
    New York University

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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