Maternal-Fetal Medicine Fellows

Mariana Espinal, MD

Third Year

Mariana Espinal is the third-year fellow who joined Northwestern in July 2022 after completing her residency at Yale-New Haven Hospital. Her research interests include labor management, preterm labor, premature prelabor rupture of membranes, postpartum pain control, and infectious disease in pregnancy. Dr. Espinal is also passionate about surgical teaching and obstetrical procedures including amniocentesis, cerclages, and complex surgery for placenta accreta spectrum. Her ongoing projects include evaluation of disparities in postpartum pain control, evaluation of gestational latency after preterm prelabor rupture of membranes and use of tocolysis, and updates in management of human immunodeficiency virus in pregnancy. In addition, she is interested in medical education, she enjoys giving lectures at the Feinberg School of Medicine, and plans to pursue a career as a clinician-educator after graduation from fellowship in 2025.

Nkechinyelum Ogu, MD

Second Year

Dr. Kiki Ogu who completed her residency training at Northwestern University Feinberg School of Medicine in June 2023, stayed to complete her Maternal Fetal Medicine fellowship training. She has an interest in fetal surgery and plans to complete a second fellowship in fetal surgery after completion of her training gin maternal-fetal medicine. Her interests include placenta accreta spectrum disorders, global medicine, and health disparities. Her collegiate background in poverty, justice and human capabilities served as the impetus for her focus on health equity as a maternal-fetal medicine physician. She completed formal education in global health and health disparities in both medical school and residency training via certificates of education. Her thesis is yet to be determined. Her current research efforts focus on quality improvement regarding trichomonas screening in pregnancy, obesity during pregnancy, impact of aspirin of fetal ductal flow on fetal echocardiography, and maternal mental health for patients undergoing fetal surgery. She will graduate fellowship in 2026.

Jessica Steinberg, MD

First Year

Colleen Judge-Golden, MD

Incoming Fellow

Dr. Judge-Golden will be joining the Northwestern University Feinberg School of Medicine Maternal-Fetal Medicine fellowship in July 2025 after completing her residency at Duke University Medical Center. 

Nigel Madden, MD

2024

Nigel Madden, MD joined Northwestern in July 2021 after completing her residency at Columbia University Irving Medical Center. Dr. Madden’s interests are in advocacy, healthcare disparities in obstetrics, management of periviable complications, and quality improvement. At the 2024 Society for Maternal Fetal Medicine annual conference, she participated in the Comprehensive Reproductive Health scientific forum during which she presented her work evaluating the association between abortion restriction severity and access to maternal and family social services. In March 2024, she presented her research on area poverty and pre-gestational medical comorbidities at the Society for Reproductive Investigation annual meeting. Her current ongoing projects include an evaluation of perinatal outcomes in unintended pregnancies, the association between patient-reported social determinants of health and birth outcomes, and disparities in primary cesarean section rates and indications within our hospital. She also is working closely with the Birth Equity team at Northwestern to improve processes of care for disadvantaged individuals and has completed the Academy for Quality and Safety Improvement (AQSI) program at Northwestern. Additionally, she has been involved in the initiation of and serves as a frontline provider for the Perinatal Syphilis Warmline which is an IL-based consultative service, provided in conjunction with the IDPH, designed to help target rising rates of perinatally-acquired syphilis. She graduated from fellowship in June and started her faculty career as an assistant professor at Beth Israel Deaconess Medical Center in September 2024.

Stephanie A Fisher

2023

Dr. Fisher joined Northwestern University Feinberg School of Medicine in July 2020 after finishing her residency at the Barnes-Jewish Hospital/Washington University in St. Louis. She had previously completed her Master of Public Health at the University of Miami Miller School of Medicine. She has a special interest in HIV and other infectious diseases in pregnancy, preterm birth, fetal growth restriction, and management of abnormal labor. For her thesis she has completed a cost-effectiveness analysis of universal first trimester serologic CMV screening and valaciclovir prophylaxis. She completed her fellowship training in June 2023.  Dr. Fisher recently joined the MFM Practice at Northwestern as a clinician-researcher.

Irina Rozin Cassimatis, MD

2022

Saba H. Berhie, MD

2021

Ashish Premkumar, MD, MPH

2020

Ashish Premkumar, M.D., started his training in July 2017 after completing a residency in Obstetrics and Gynecology at University of California, San Francisco. His particular interest is in perinatal substance abuse, preeclampsia, and bioethical concerns in perinatal health. Dr. Premkumar also completed graduate training in cultural anthropology at The Graduate School at Northwestern University, with a focus on the intersection of perinatal substance abuse and socioeconomic marginalization. Currently, an Assistant Professor in the Section of Maternal-Fetal Medicine in the Department of Obstetrics and Gynecology at Pritzker School of Medicine, The University of Chicago.  My clinical and research interests include the intersection of maternal-fetal medicine and family planning, maternal-fetal therapy, perinatal infectious diseases, hypertension in pregnancy, and placenta accreta spectrum disorder.

Nevert Badreldin, MD, MS

2019

Dr. Badreldin joined Northwestern University Feinberg School of Medicine in July of 2016 after she completed her residency at Duke University in Durham, North Carolina. Her special interests are in clinical obstetrics and preterm labor, and her research and thesis during fellowship was focused on Postpartum opiod prescribing practices and patient utilization.  Dr. Badreldin completed her fellowship in July of 2019 and has joined the Maternal-Fetal Medicine faculty at Baylor's College of Medicine and Texas Children's in Houston, TX. 

Ann Melissa Dude, MD, Ph.D

2018

Dr. Dude joined Northwestern University Feinberg School of Medicine in July 2015 after completing her residency at University of Illinois at Chicago, Chicago, IL.  Her special interest are clinical obstetrics and preterm labor.  Her thesis and research interest during fellowship focused on the Inter-delivery weight gain and risk of cesarean delivery following prior vaginal birth.  Dr. Dude completed her fellowship in 2018 and has joined the MFM faculty at the University Of North Carolina, Dept of Obstetrics and Gynecology in Chapel Hill, NC.

Moeun Son, MD, MSCI

2017

Dr. Son joined Northwestern University Feinberg School of Medicine in July 2014 after completing her residency at Columbia University, New York Presbyterian Hospital in New York.  Her research thesis during fellowship focused on universal cervical length screening in women without history of prior preterm delivery and its association with the preterm birth rate.  She was also awarded a Friends of Prentice Foundation grant to conduct a double-blind randomized clinical trial comparing high-dose and low-dose oxytocin regimens for labor augmentation in nulliparous women.  With the full support of the department, she earned her MSCI degree from the Northwestern Graduate School during her fellowship.  Dr. Son completed her fellowship in June 2017 and has joined the MFM faculty at Yale University Medical Center in New Haven, Connecticut.  

Anna Palatnik, MD

2016

Dr. Palatnik joined Northwestern University Feinberg School of Medicine in 2013 after finishing her residency at the Medical College of Wisconsin.  Her special interests are clinical obstetrics and preterm labor. Her research interest is the association of subchorionic hematoma with cervical length and preterm birth.  Dr. Palatnik completed her fellowship in 2016 and is now a full-time faculty member in the Dept. of Obstetrics and Gynecology Medical College of Wisconsin. 

Lynn Yee, MD, MPH

2015

Dr. Yee completed her residency at the University of California San Francisco in California and started her Fellowship with Maternal-Fetal Medicine in July 2012. She also completed her Master's in Public Health in 2008. Her interests are in health disparities, decision making in pregnancy, health literacy, and health services research. Dr. Yee completed her fellowship in July 2015 and joined the MFM faculty at Northwestern in September 2015.