Sonja B. Kristiansen, MD

About Sonja B. Kristiansen, MD

If you have been trying to get pregnant for months or years, you may not know where to go for help.

Fertility doctors offer a range of services to help patients get pregnant, including fertility testing and treatments such as IVF.

Sonja B. Kristiansen, MD, is a board-certified Reproductive Endocrinologist Infertility specialist who has helped many hopeful parents.

What Sets Dr. Kristiansen Apart?


A native Texan, Dr. Kristiansen began her pursuit of becoming a Reproductive Endocrinologist Infertility (REI) specialist when she received her medical degree from Texas Tech University School of Medicine in Lubbock, Texas.


Next, she completed a residency program in Obstetrics & Gynecology at John Peter Smith Hospital in Fort Worth, Texas. She decided to continue her training with a fellowship in the division of Reproductive Endocrinology and Infertility at Baylor College of Medicine in Houston, Texas.

Board Certification

Dr. Kristiansen is a board-certified Reproductive Endocrinologist Infertility (REI) specialist. This means she has undergone years of specialized study and training in fertility and has passed the American Board of Obstetrics and Gynecology's written and oral exams.

High IVF Success Rates

Having completed more than 1000 IVF cycles with pregnancy rates that compare well nationally, the Houston Fertility Center is now utilized by several other Reproductive Endocrinologists in the Sugarland and greater Houston areas.

Recognition in the Field

Dr. Kristiansen is well published, participates in many speaking engagements relating to infertility, and is frequently used as a resource by the news media.

Flexible Hours for Appointments

Recognizing most couples work and therefore have demanding schedules, she offers early morning appointments (7:00 am) for patients undergoing treatment. This allows most patients to be at work anywhere in Houston by 9:00 am.

About Houston Fertility Center

In 1996, Dr. Kristiansen realized her dream of starting her own infertility center by founding the Houston Fertility Center, where she serves as the Medical Director. Her goal in establishing this clinic and her own private practice "Where Women Specialize in the Care of Women" was to provide couples with complete and comprehensive infertility treatment in a compassionate, private environment that was easily accessible and affordable.

Team at Houston Fertility Center

Dr. Kristiansen's Commitment to Her Patients

During her OB/GYN residency, Dr. Kristiansen became dedicated to addressing the challenges of infertility, in both the surgical and technical aspects:

"Seeing the smile on the face of my patient when we conquered the problem was addicting." Dr. Kristiansen

"Thank You So Much Dr. K and Staff"


Reyna Alcala


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Personally i had a good experience with my invocell process started meds for 2 weeks in September by october 8 had the transfer and couple days later the positive pregnancy test! My baby boy is now 1 month old and im in love ❤ Thank you so much Dr. K and staff you were all amazing!!

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Meli Rodriguez


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Dr Kristiansen and her staff are amazing! I did invocell and had a great experience. I liked that I always got a staff person on the phone when I called. They are great at returning emails quickly too. You won’t be disappointed. They will take good care of you!

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Dr. Kristiansen's Personal Infertility Struggles

Dr. Kristiansen met and married her husband during their OB/GYN residency, but she delayed having her own children to pursue her career. She had her first son toward the end of her REI fellowship. Four long years later, she had a second son. She personally understands the struggles and choices some women make regarding their careers and childbearing.

If you want to wait to have a child, are having difficulty getting pregnant, or want to learn more about fertility options for the LGBTQ+ community, take the first step toward starting your family by scheduling an appointment at our practice.

Couple holding ultrasound picture of woman's pregnant stomach

Dr. Kristiansen Is Active in the Community

Dr. Kristiansen recently joined her local rotary club!

Dr. Kristiansen with Rotary Club

Time Is Running Out Undergo INVOcell with PGT for $9,400 

Houston Fertility Center is the first clinic in Houston to offer INVOcell, a new, revolutionary, and affordable treatment option with PGT for $9,400 per cycle!  Must meet eligibility requirements. Medication costs vary.  Frozen Embryo Transfer required.

Other INVOcell Services

We are proud to now offer:

  • Reciprocal INVOcell with PGT
Dr. Sonja Kristiansen

Houston Fertility Center

Dr. Sonja Kristiansen is the founder and Medical Director of Houston Fertility Center. She is a board-certified Reproductive Endocrinologist Infertility (REI) specialist who is proud to help hopeful parents fulfill their dreams of having children. Our center is affiliated with the:

  • American College of Obstetricians and Gynecologists
  • American Society for Reproductive Medicine
  • Texas Medical Association

We provide convenient care for patients from greater Houston and visitors from out of town. For more information about our services, contact our office online or call (713) 225-5375 today.

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