Fertility Clinic Serving Houston, The Woodlands, and Beyond

At Houston Fertility Institute, we recognize the important role that trusting, caring relationships between patients, physicians, and staff play in overcoming infertility. All of our patients are cared for with sensitivity, compassion, and understanding throughout their treatment process. Patients benefit from the expertise of our physicians at every visit. Our infertility treatment experts, Dr. Jimmy Gill, Dr. Jason Griffith, Dr. Gus Haddad, Dr. Daniel B. Williams, Dr. Craig Witz, and Dr. Wei-Hua Wang, are professionals of the highest caliber and are on the leading edge of developments in technology and treatment options. As a reputable fertility clinic serving Texas from offices in The Woodlands, Houston, Willowbrook, Tomball, Katy, Sugar Land, Medical Center, and Clear Lake, we can provide our patients with a full spectrum of diagnostic testing and infertility treatment options, including infertility testing, surrogacy services, in-vitro fertilization (IVF), intrauterine insemination (IUI), and preimplantation genetic diagnosis (PGD).

• Dr. Jimmy Gill
• Dr. Gus Haddad
• Dr. Jason Griffith
• Dr. Daniel B. Williams
• Dr. Craig A. Witz
• Dr. Wei-Hua Wang
• Dr. Karen E. Krause
• Dr. Stuart J. Nathan
• Staff Members

Dr. Jimmy Gill - Founder & Medical Director

Houston Fertility Institute's expert medical team is led by Dr. Jimmy Gill, a reproductive endocrinologist and the medical director of the center. Dr. Gill graduated from the University of Houston and received his medical degree from the University of Texas Medical Branch at Galveston.

After completing his residency in obstetrics and gynecology at St. John's Hospital of Cornell University in New York City, he completed a fellowship in reproductive endocrinology and infertility at Rush Presbyterian - St. Luke's Medical Center in Chicago. Dr. Gill is board certified by the American College of Obstetrics and Gynecology. Prior to founding Houston Fertility Institute, Dr. Gill practiced with one of the largest infertility clinics in the Midwest. He has also served as the associate professor of the Reproductive Endocrinology and Infertility Department at Michigan State University. Dr. Gill has authored and been published in many professional journals as well as presented research and findings at numerous industry conferences.

Dr. Gus Haddad - Medical Director

Dr. Haddad is the medical director at Houston Fertility Institute. He obtained his medical degree from the American University of Beirut, where he became a member of the prestigious Alpha Omega Alpha medical honor society. He then completed his residency in obstetrics and gynecology at the University of Mississippi Medical Center. After his residency, Dr. Haddad went on to complete his fellowship in reproductive endocrinology and infertility at the University of Cincinnati Medical Center. 

He is board certified in both obstetrics and gynecology, as well as reproductive endocrinology-infertility and also serves as assistant clinical professor at the Department of Obstetrics and Gynecology at the University of Texas. Dr. Haddad joined Houston Fertility Institute to help cope with the rapidly expanding fertility practice in the Houston metropolitan area. He has authored multiple book chapters and peer reviewed articles, as well as presented original research in the field of infertility at national meetings.

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Dr. Jason Griffith - Practice Director

Dr. Griffith completed his residency and fellowship in reproductive endocrinology at the University of Texas Health Science Center at San Antonio.  He completed his undergraduate degree at Texas A&M University and he also earned a master's degree in physical therapy from Baylor University. After serving six years in the U.S. Army Medical Specialist Corps, he returned to Texas to complete medical school at the University of Texas Health Science Center at San Antonio. 

During medical school, he earned the McNutt and Klein awards for academic achievement and was inducted to the prestigious Alpha Omega Alpha medical honor society. He has published in peer-reviewed journals, as well as presented original research at national meetings. Dr. Griffith is board certified by the American College of Obstetrics and Gynecology.

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Dr. Daniel B. Williams - Medical Director

Dr. Williams received both his undergraduate degree in biology and his medical degree from The University of Missouri-Kansas City School of Medicine. He completed residency training in obstetrics and gynecology at King-Drew Medical Center in Los Angeles and completed his fellowship in reproductive endocrinology and infertility at UCLA/Cedars Sinai Medical Centers. Following his training, Dr. Williams joined the faculty at Washington University School of Medicine as an associate professor and the medical director of the IVF program. He then served as a professor of obstetrics and gynecology and the medical director for the Center for Reproductive Health at The University of Cincinnati School of Medicine.

Dr. Williams is the recipient of numerous teaching awards and has also been repeatedly named one of the Best Doctors in America. In 2009, Dr. Williams joined Houston Fertility Institute where he also serves as the Director of the Egg Donor Program. He is a fellow in the American College of Obstetrics and Gynecology and is board certified in obstetrics and gynecology as well as reproductive endocrinology-infertility.

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Dr. Craig A. Witz - Director of Clinical Research

Dr. Craig Witz did his undergraduate studies at Harvard University where he graduated with honors and attended medical school at The Baylor College of Medicine in Houston. He completed both his ob-gyn residency and reproductive fellowship at the University of Texas Health Science Center at San Antonio where he was a faculty member in the division of Reproductive Endocrinology and Infertility and became and served as the Chief of the division.

Dr. Witz is board certified in both obstetrics and gynecology, as well as reproductive endocrinology-infertility. He has done extensive research in the area of endometriosis and has won multiple awards for his publications evaluating its’ pathogenesis. Dr. Witz joined the team at Houston Fertility Institute to assist with the growth of the practice and brings his many years of experience to the care of his patients.

Click here to view Dr. Witz's CV

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Dr. Wei-Hua Wang - IVF Laboratory Director

Dr. Wang serves as the laboratories’ PhD director, embryologist, and andrologist for the in-vitro fertilization laboratories at Houston Fertility Institute. He earned his doctorate in reproductive physiology from Okayama University in Japan. Dr. Wang has worked in embryology and infertility laboratories for 20 years and was a supervisor in multiple laboratories including Women and Infants Hospital, Brown University School of Medicine, New England Medical Center, and Tufts University School of Medicine before joining the staff at Houston Fertility Institute.

Dr. Wang has proficient skills in manipulating human embryos including IVF, ICSI, assisted hatching, and cryopreservation of gametes and embryos. His infertility research has been widely recognized both nationally and internationally.

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Dr. Karen E. Krause

Dr. Krause is a licensed clinical psychologist who has been practicing in the Houston area since 1993. After receiving her doctorate from California School of Professional Psychology in Los Angeles, California, with a proficiency in health and medicine, she completed her internship at the Houston VAMC and her post-doctoral training with Behavioral Healthcare Associates in Houston. For the past 14 years, Dr. Krause has worked exclusively with individuals who are struggling to cope with medical conditions.

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Dr. Stuart J. Nathan

Dr. Stuart J. Nathan has been practicing as a licensed clinical psychologist in the Houston area since 1987. He earned his bachelor’s degree from Indiana University, a master’s degree from Loyola University in Chicago and a doctorate from Texas A&M University – all in psychology. He completed his internship at the Houston VMAC with a specific interesting in working with patients with various medical conditions. Dr. Nathan is the co-founder of Behavioral HealthCare Associates in Houston which is a group of licensed doctoral and master’s level therapists specializing in specific psychological issues unique to the medical patient. He also works with couples and individuals with depression, anxiety and relationship issues.

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Staff Members

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Contact the Fertility Specialists at Our Texas Clinic

At our fertility clinic with Texas locations in The Woodlands, Houston, Willowbrook, Tomball, Katy, Sugar Land, Medical Center, and Clear Lake, we provide a wide range of services and programs for our patients. Comprised of highly trained physicians, technicians, and professionals who are experts in the field of infertility, our staff is here to assist you in realizing your dream of having a child. Start your journey with Houston Fertility Institute today.

Our Locations

Houston Office & IVF Lab
2500 Fondren, Suite 350
Houston, Texas 77063
Ph: 713-490-2527
Fax: 713-334-5547
Map & Directions

Tomball Regional Hospital - IVF Lab
605 Holderreith Blvd, 2nd Floor
Tomball, Texas 77375
Ph: 281-357-1881
Fax: 832-237-1436
Map & Directions

Clear Lake Office
251 Medical Center Blvd, Suite 125
Webster, Texas 77598
Ph: 281-286-4434
Fax: 281-554-5115
Map & Directions

Katy Office
23920 Katy Freeway, Suite 340
Katy, Texas 77494
Ph: 281-693-2434
Fax: 281-693-2455
Map & Directions

Medical Center Office
6400 Fannin, Suite 2000
Houston, Texas 77030
Ph: 713-796-1434
Fax: 713-796-1438
Map & Directions

Sugar Land Office
16545 Southwest Freeway, Suite 275
Sugar Land, Texas 77479
Ph: 281-242-3434
Fax: 281-242-3436
Map & Directions

The Woodlands Office
9200 Pinecroft, Suite 480
The Woodlands, Texas 77380
Ph: 281-681-0480
Fax: 281-681-9170
Map & Directions

Willowbrook Office
13215 Dotson, Suite 100
Houston, Texas 77070
Ph: 832-237-1434
Fax: 832-237-1436
Map & Directions