UCHealth
Ranked #1 in Colorado by U.S. News & World Report
CU Obstetrics and Gynecology Residency Program
CU Obstetrics and Gynecology Residency Program
CU Obstetrics and Gynecology Residency Program
Welcome to the CU OB-GYN Residency Program
The University of Colorado Obstetrics and Gynecology Residency Program has proudly trained outstanding physicians for over 60 years. We are committed to developing future leaders who will shape the health of patients and communities across Colorado and beyond.
Our residents gain outstanding clinical experience across three distinct hospital systems — University of Colorado Hospital, Denver Health Medical Center, and Rose Medical Center — giving them exposure to a wide range of patient populations and healthcare settings. They rotate through all sites, building skills and confidence with increasing responsibility each year, ultimately stepping into leadership roles as chief residents in their final year.
In addition to comprehensive clinical training, we offer opportunities in quality improvement, palliative care, interprofessional education, advocacy, research, and global health. Our innovative curriculum, led by passionate and supportive faculty, prepares residents to thrive in whatever path they choose — whether private practice, rural care, or competitive subspecialty fellowships.
Education is at the heart of what we do. Residents learn through direct, hands-on clinical care, weekly didactics, simulation training, and protected research time. Our structured intern boot camp and specialized workshops in teaching, advocacy, and quality improvement provide unique, enriching learning experiences. Colorado provides unmatched opportunities for training across the full spectrum of reproductive healthcare, including comprehensive family planning services. Residents also look forward to signature events like our annual Colorado Lobby Day and the resident retreats.
Above all, the Department of OB-GYN at the University of Colorado is a place where residents are supported, challenged, and encouraged to reach their fullest potential. We care deeply about your wellness, growth, and success — both inside and outside the hospital.
Thank you for your interest in our program. We can't wait to meet you and welcome you to Denver!
CU OB-GYN Residency Program Leadership
Christine Conageski, MD, MSc
Residency Program DirectorChristine Conageski, MD, MSc
Residency Program Director
OB-GYN Interests
Medical education, lower genital tract disease, infectious disease, cervical, vulvar and anal dysplasia.
Education
Case Western Reserve University
Undergrad
University of Cincinnati College of Medicine
Medical School
University of Colorado
Residency
Why I Like Denver
I'm from the Midwest so I feel very comfortable here. The people are friendly, the weather is mild compared to Michigan where I was born and we are surrounded by endless outdoor activities and awesome vistas everywhere you turn.
Personal Interests
Spending time with my family! This includes everything from swimming, hiking, biking, going to the zoo, eating ice cream and teaching them about the world around them. Plus, I couldn’t live without my Peloton!
Nicole Larrea, MD
Associate Program Director, Denver HealthNicole Larrea, MD
Associate Program Director, Denver Health
OB-GYN Interests
Care for vulnerable populations, ultrasound, emergency obstetrics/gynecology, female genital cutting and asylum care.
Education
Princeton University
Undergrad
University of Texas Southwestern Medical School
Medical School
University of Colorado
Residency
Why I Like Denver
I like the easy access to outdoor activities / the mountains while also getting to live in a city.
Personal Interests
Spending time outdoors with my family, cycling when time allows
Sarah Peterson, MD
Associate Program Director, Rose HospitalSarah Peterson, MD
Associate Program Director, Rose Hospital
OB-GYN Interests
Coming soon!
Education
University of Michigan
Undergrad
Wayne State University School of Medicine
Graduate Degree
Wayne State University School of Medicine
Medical School
University of Colorado
Residency
Stanford Hospital and Clinics Program
Fellowship
Why I Like Denver
Coming soon!
Personal Interests
Coming soon!
Shannon Son, MD, MSci
Associate Program Director, University HospitalShannon Son, MD, MSci
Associate Program Director, University Hospital
OB-GYN Interests
I am a Maternal-Fetal Medicine Physician and have special interests in Cardio-Obstetrics as well as complex deliveries including operative and multifetal deliveries. I aim to provide patient centered and individualized care for all pregnant people and hope to promote the same in my teaching. I am lucky to work with residents and fellows in our High Risk and Diabetes clinics both at the University and Denver Health.
Education
University of Arizona
Undergrad
University of Utah
Graduate School
University of Washington
Medical School
University of Colorado
Residency
University of Utah
Fellowship
Why I Like Denver
I love Denver because of all it has to offer. With a large city and mountains close by, people with various interests are able to find their home.
Personal Interests
I love to spend time outdoors, mostly riding bikes and hiking with my family. I also love spending time in the mountains all year round and being close to an international airport for easy travel.
Spyridon Alex Mastroyannis, MD, MSci
Associate Program Director, University HospitalSpyridon Mastroyannis, MD, MSCE
Associate Program Director, University Hospital
OB-GYN Interests
Education
Yale University (CT)
Undergrad
University of Pennsylvania
Graduate School
George Washington University School of Medicine and Health Sciences
Medical School
Hospital of the University of Pennsylvania
Residency
University of Pennsylvania Health System Program
Fellowship
Why I Like Denver
Coming soon!
Personal Interests
Coming soon!
Christine Conageski, MD, MSc
Residency Program Director
OB-GYN Interests
Medical education, lower genital tract disease, infectious disease, cervical, vulvar and anal dysplasia.
Education
Case Western Reserve University
Undergrad
University of Cincinnati College of Medicine
Medical School
University of Colorado
Residency
Why I Like Denver
I’m from the Midwest so I feel very comfortable here. The people are friendly, the weather is mild compared to Michigan where I was born and we are surrounded by endless outdoor activities and awesome vistas everywhere you turn.
Personal Interests
Spending time with my family. This includes everything from swimming, hiking, biking, going to the zoo, eating ice cream and teaching them about the world around them. Plus, I couldn’t live without my Peloton!
Nicole Larrea, MD
Associate Program Director, Denver Health
OB-GYN Interests
Care for vulnerable populations, ultrasound, emergency obstetrics/gynecology, female genital cutting and asylum care.
Education
Princeton University
Undergrad
University of Texas Southwestern Medical School
Medical School
University of Colorado
Residency
Why I Like Denver
I like the easy access to outdoor activities / the mountains while also getting to live in a city.
Personal Interests
Spending time outdoors with my family, cycling when time allows
Sarah Peterson, MD
Associate Program Director, Rose Hospital
OB-GYN Interests
Coming soon!
Education
University of Michigan
Undergrad
Wayne State University School of Medicine
Graduate Degree
Wayne State University School of Medicine
Medical School
University of Colorado
Residency
Stanford Hospital and Clinics Program
Fellowship
Why I Like Denver
Coming soon!
Personal Interests
Coming soon!
Shannon Son, MD, MSci
Associate Program Director, University Hospital
OB-GYN Interests
I am a Maternal-Fetal Medicine Physician and have special interests in Cardio-Obstetrics as well as complex deliveries including operative and multifetal deliveries. I aim to provide patient centered and individualized care for all pregnant people and hope to promote the same in my teaching. I am lucky to work with residents and fellows in our High Risk and Diabetes clinics both at the University and Denver Health.
Education
University of Arizona
Undergrad
University of Utah
Graduate School
University of Washington
Medical School
University of Colorado
Residency
University of Utah
Fellowship
Why I Like Denver
I love Denver because of all it has to offer. With a large city and mountains close by, people with various interests are able to find their home.
Personal Interests
I love to spend time outdoors, mostly riding bikes and hiking with my family. I also love spending time in the mountains all year round and being close to an international airport for easy travel.
Spyridon Alex Mastroyannis, MD, MSCE
Associate Program Director, University Hospital
OB-GYN Interests
Coming soon!
Education
Yale University (CT)
Undergrad
University of Pennsylvania
Graduate School
George Washington University School of Medicine and Health Sciences
Medical School
Hospital of the University of Pennsylvania
Residency
University of Pennsylvania Health System Program
Fellowship
Why I Like Denver
Coming soon!
Personal Interests
Coming soon!
To develop comprehensively trained specialists in Obstetrics and Gynecology who will serve as leaders in reproductive healthcare.
CU OB-GYN Residency Mission Statement
Hello and welcome to our CU OB-GYN Residency Page! We are so glad you are considering our program for your training. There are a multitude of reasons we have loved our training here. It would be impossible to outline them all in just a couple of paragraphs, so we’ll focus on the three big ones: diversity of clinical experiences, fulfilling interprofessional relationships, and life in Colorado!
We rotate at three different hospitals (academic, county, and private), which enables residents to train with a variety of providers and serve patients from a broad range of backgrounds and experiences. From participating in gender-affirming care at our LGBTQ Center of Excellence, to caring for our complex antepartum service at the University hospital, to extensive surgical experience operating with busy Gyn Onc and MIGS services, to full scope complex family planning in both the inpatient and outpatient setting, our residents get robust training in the many parts of obstetrics and gynecology that make it such a rewarding specialty. We have high clinical volume and graduate exceptionally well-trained OB-GYNs that feel ready to pursue both generalist and specialist practice.
Another fulfilling part of our program in Colorado is the community. Each residency class becomes incredibly close over the course of four years, and the same can be said with our relationships with the attendings. This program boasts a strong culture of graduated autonomy so that residents can practice at the top of their skill level with supportive supervision by their chiefs and attendings. Residents also work closely with midwifery colleagues and L&D nurses to nurture an environment of mutual learning and patient-centeredness.
Finally, we love Colorado! Whether it’s soaking in the sun on one of Denver’s many outdoor patios, hitting the ski slopes after a call shift, or going on a hike with the residency pups, we love to take advantage of the many amenities the Rocky Mountain state has to offer (with its 300 days of sunshine a year)!
We are so glad you decided to stop by, and very much hope to meet you soon!
Vera Schulte, MD & McKenna Kelly, MD
Administrative Chief Residents (2024-2025)
Children's Hospital Colorado
Rated #10 U.S. News Best Children's Hospitals Honor Roll
OB-GYN Clinical Research
179 Active Clinical Studies, 25 Active Clinical Trials
NIH Funding
Rated #13 in OB-GYN NIH Funding to US Medical Schools in 2018