Erin O’Brien, MMS, PA-C

Newark Location Newark, DE
Chesterbrook Location Chesterbrook, PA
Schedule Appointment or 1-888-761-1967
Patient Testimonial
We are so blessed to have found Shady Grove and Dr. Vitez, Hailey, and Bree and the rest of the Shady Grove staff.

Simply put, SGF helped my husband and I become parents to our son, and for that, we are forever grateful to the SGF crew. Thank you will never be enough, but THANK YOU SGF!

Loved my experience with SGF! They go above and beyond for their patients. I highly recommend them to all my friends and family members who may experience some sort of pregnancy infertility or complication because they felt like family when I finally got to announce a successful pregnancy.

With Dr. Mitchell, I felt like I actually had options and was an active participant in my treatment plan. One of the things that sets her apart is how communicative she is. She personally handled most of my appointments, and when she didn’t, she always made a point to call or send a message.

From the very first consultation, Dr. Mitchell made my husband and I feel at ease and reassured. Having a infertility diagnosis felt so scary and left us with so many questions about the future, but she helped ease our fears.

This has been far an experience for my family, and I however doctor Mitchell has been amazing and very straight forward from the very beginning. I’m so thankful for her and the wonderful staff that made me feel as family everytime I arrived there.

Biography

Erin O’Brien, MMS, PA-C, earned her Bachelor’s degree from Widener University in Chester, Pennsylvania, before completing her Master of Medical Science at Drexel University in Elkins Park, Pennsylvania. During her physician assistant training, Erin completed a clinical rotation in Reproductive Endocrinology and Infertility at Shady Grove Fertility’s Chesterbrook location, where she discovered her passion for fertility care. 

Before joining SGF in January 2026, Erin gained valuable hands-on patient care experience working as an Emergency Medical Technician and a Rehabilitation Technician. These roles strengthened her clinical skills and reinforced her commitment to compassionate, patient-centered care. 

Erin’s responsibilities at SGF include performing baseline, monitoring, and obstetrical ultrasounds; intrauterine inseminations (IUIs); hysterosalpingograms (HSGs); saline sonograms and mock embryo transfers (SIS/MET); and gynecological procedures such as endometrial biopsies. She also conducts physical exams, evaluates patients for urgent concerns such as pain or bleeding, reviews laboratory results, and assists in clinical decision-making.  

Erin currently cares for patients at SGF’s Newark, Delaware, and Chesterbrook, Pennsylvania, locations. Outside of work, she enjoys spending time with family and friends, cheering on her favorite sports teams, staying active, and hanging out with her dog, Lola. She also has a creative side and loves interior design and home renovation projects, a passion that often surprises those who know her. 

 

Education

  • Bachelor of Science in Biology, Widener University, Chester, Pennsylvania
  • Master of Medical Science at Drexel University in Elkins Park, Pennsylvania
  • Perform ultrasounds including baseline, monitoring, and obstetrical    
  • Perform intrauterine inseminations (IUI)   
  • Perform hysterosalpingograms (HSGs)   
  • Perform saline sonograms/mock embryo transfers (SIS/MET)   
  • Perform urgent care evaluations for pain and/or bleeding   
  • Perform gynecological procedures such as endometrial biopsies    
  • Perform physical exams    
  • Review lab results and assist in clinical decision making for patients   
  • American Academy of Physician Assistants   

Q&A

I chose to work in reproductive medicine after completing a rotation in reproductive endocrinology and infertility, where I discovered how meaningful and impactful this work can be. I am passionate about helping individuals and couples build their families.

I love spending time with my family and friends, cheering on my favorite sports teams, staying active, and enjoying time with my dog, Lola.

Most people are surprised to learn that I have a passion for interior design and home renovations and enjoy following design trends and creative projects.

2026 Shady Grove Fertility

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