Natalie A. Stewart, MSN, WHNP-BC 

Patient Testimonial
I would highly, highly recommend Dr. O’Hern! Throughout my struggles with infertility, she has been kind, supportive, thoughtful, and determined to help me achieve a pregnancy. The staff at SGF, both in Clear Lake and the Medical Center, are amazing to work with!

Working with Dr. Kallen and his entire team was an absolute pleasure. They took time in designing a medical plan specific to our situation. Dr. Kallen never gave up on us and constantly reassured us at every step of the way to a successful pregnancy! We are very grateful for Dr. Kallen the SGF team!

Dr. Healy is so kind and selfless she is one of the kindest people that I’ve ever met. I definitely recommend her for any fertility treatments that people may need. We would never choose anyone else to handle our care. If you were looking for a fertility doctor, she is, hands-down, the best.

Dr. Mitchell and her team are dedicated to their patients in their journey to getting pregnant. She is so kind and always makes sure you are comfortable and understand what’s going on and next steps. She communicates so well with her team and patients and I cannot be more happy with my experience.

10 out of 10 recommend! From the first day we stepped foot in Dr. Shah’s office we could feel the amount of love and care him and his team give to their patients. Our fertility journey wasn’t easy but this clinic went above and beyond to make sure it was successful.

I switched to SGF because of our first visit with Dr. Shah. He has great bedside manner, clear communication, manages expectations, and has a great staff. He is very proactive with your healthcare and makes you feel cared for. 


Natalie A. Stewart, MSN, WHNP-BC, earned her Bachelor of Science in Nursing from Excelsior College in Albany, New York, followed by a Master of Science in Nursing, (MSN) and Women’s Health Nurse Practitioner certification from Duke University in Durham, North Carolina.  

Prior to joining SGF, Natalie worked as a nurse practitioner in maternal-fetal medicine doing diabetes management and high-risk obstetrics. Most of her nursing career before she was a nurse practitioner was in inpatient women’s health. 

Since joining SGF in 2022, Natalie’s responsibilities include counseling patients on various fertility treatments, performing monitoring and baseline ultrasounds for fertility preservation and treatments, and completing intrauterine inseminations (IUI), endometrial biopsies, mock embryo transfers, and more.  

Natalie currently sees patients as a nurse practitioner at SGF’s Norfolk, Virginia, location. In her free time, she enjoys gardening and crafting.  



  • Bachelor of Science in Nursing, Duke University, Durham, North Carolina 
  • Master of Science in Nursing, Duke University, Durham, North Carolina 
  • 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 Society for Reproductive Medicine (ASRM)  


What I love about my job at SGF is that I get to focus on endocrinology and hormones, while also educating and empowering patients about how their bodies function, teaching what we’re looking for when we’re doing tests, why we’re using certain medications, and what’s happening in their bodies. In addition to this, there is a huge psychological component to our work. By the time people walk into our office, they’ve likely already been on an emotional roller coaster, no matter how long their fertility experience has been. It’s important to me to support our patients and their partners in the best way I can as they make their way through their journey with us, and that’s a different approach for each person. 

I love to garden and have quite a few plants in my office at work. I like to sew and knit, but over the years, these hobbies have turned into more of a textile collection and less of an active hobby. I need to develop a closet cleaning hobby! 

I happen to have two incredible moms, so I have experienced firsthand that there are many ways that people create families.