About Mississippi Reproductive Medicine (MRM)

Mississippi Reproductive Medicine (MRM) is dedicated to treating couples with compassion and advanced clinical care. Our IVF laboratory allows us to offer the highest quality medical treatment for infertility in a state-of-the-art environment. We are committed to evidence-based care with consideration for cost-effective solutions.

“The treatment of infertile couples is both challenging and rewarding. This is my passion.”

Dr. Hines has been practicing reproductive medicine for over 19 years. He is Board Certified in Obstetrics & Gynecology and Reproductive Endocrinology & Infertility, and his research has been published in multiple peer-reviewed scientific journals. In 1996, Dr. Hines joined the faculty of the University of Mississippi Medical Center, where he held the positions of Professor, Division Director, and IVF Program Director. In August 2010, he established Mississippi Reproductive Medicine to continue practicing the science-based approach that has been effective throughout his career and to offer a welcoming environment for his patients.

BA, Reed College, 1982
MD, University of Mississippi School of Medicine, 1988
Residency, University of Kentucky Medical Center, 1988-1992
Fellowship, Medical College of Georgia, 1992-1994

Society Memberships: American Society for Reproductive Medicine, Society for Assisted Reproductive Technology, Society for Reproductive Endocrinology and Infertility. He is a past board examiner for American Board of Obstetrics and Gynecology.

Marty Gebhart, DNP, NP


“I feel privileged to be a part of a dynamic team of healthcare providers, and to have the trusted opportunity to share in each unique patient experience.”

Dr. Gebhart is a board-certified Family Nurse Practitioner. She attended Mississippi State University and was graduated summa cum laude from The University of Mississippi Medical Center (UMMC) School of Nursing in 1994. She began her career in Obstetrics and Gynecology at UMMC, and after gaining extensive experience in women’s health, she returned to UMMC and was graduated summa cum laude with a Master’s of Science and later completed her education by earning her Doctorate of Nursing Practice from The University of Alabama at Birmingham. She partnered with Dr. Hines with the opening of Mississippi Reproductive Medicine in 2010. In addition to her board certification as a Nurse Practitioner, she is also a Registered Nurse First Assistant (RNFA) and assists Dr. Hines with all reproductive surgeries at MRM, including egg retrievals and embryo transfers, as well as in-patient and out-patient surgeries. She has completed numerous continuing education hours including the American Society of Reproductive Medicine (ASRM) certificate course in Reproductive Endocrine and Infertility, designating MRM as the state’s only Nursing Center of Excellence. Dr. Gebhart was recently elected to serve a 5-year term (2018-2023) on ASRM’s Board of Directors for the Nurses Professional Group and will serve as Chair in 2020.

Dr. Gebhart is particularly interested in Pre-Implantation Genetic Screening (PGS) and has conducted and published her research in Fertility and Sterility, a peer-reviewed international journal, in addition, presented her research at several national conferences identifying the patient perceived determinants of decision making and the use of PGS as adjuvant therapy in IVF. She works with patients through the use of evidence-based practice guided by historical and current research.

Professional memberships:
American Academy of Nurse Practitioners, Mississippi Nurses Association, Mississippi Association of Nurse Practitioners, ASRM Reproductive Endocrine & Infertility Nurses Professional Group, ASRM Advanced Practice Provider Group, Association of Women’s Health, Obstetrics, and Neonatal Nursing and the National Association of Nurse Practitioners in Women’s Health

Aldo Esterhuizen, PhD, HCLD, Lab Director


“I am honored to be the one to share the first days of the magical development of the human embryos. Their very existence compels me to diligently carry out the challenging task of caring for them with the utmost precision and enthusiasm. I have found and pursued my passion.”

Dr. Esterhuizen has been active in this field for more than three decades. Prior to joining Mississippi Reproductive Medicine in September 2014, she was the Laboratory Director at Medfem Clinic in Bryanston, currently the largest Assisted Reproductive Technology (ART) Unit in South Africa.

Dr. Esterhuizen completed her Ph.D. thesis entitled, Evaluation of Gamete Dysfunction as a Cause of Failed Human in Vitro Fertilization in the Department of Obstetrics & Gynecology, Stellenbosch University, South Africa in 2000. Her studies and the outcome thereof have been referenced in several national and international presentations by her colleagues (Belgium, India and The Sudan) and published in several internationally recognized peer journals.


She became an American Board of Bioanalysis certified Technical Supervisor in 2017 in Andrology and Embryology and a High Complexity Clinical Laboratory Director in 2019 at which time she was appointed as Laboratory Director at Mississippi Reproductive Medicine.

Carlos Guerrero, PhD

Dr. Carlos Guerrero is a graduate of Louisiana State University, where he received his Ph.D. degree in Reproductive Physiology with an emphasis in Embryology. Prior to joining MRM, Dr. Guerrero was a Senior Embryologist and Head of Research and Development at the THR Presbyterian-Harris Methodist ARTS Program in Dallas-Fort Worth, TX. He is board certified in Human Clinical Andrology and Embryology and is a High Complexity Clinical Laboratory Director and In Vitro Fertilization Laboratory Director by the American Board of Bioanalysis. As Laboratory Director, Dr. Guerrero oversees and is directly involved on a daily basis with the quality control/quality assurance and overall functioning of the Andrology, Endocrinology and Embryology Laboratories.

Susan Smith

Registered Nurse
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Cat McIntyre

Registered Nurse
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Britney Cochran

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Emilia Calderon

Front Office
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Stuart Hines

Front Office Coordinator
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Lynnette Hale

Appointments/New Patients
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Mary Lea

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Laura Hartlein

Registered Dietitian/Nutritionist
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Burchie Ellinger

Marketing/Patient Experience
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In order to receive CAP accreditation, a laboratory must demonstrate that it operates with the highest standards of quality, accuracy and consistency. The CAP inspection process investigates several components of the laboratory: assay validation data, quality management program, sample tracking procedures, lab personnel qualifications, facilities, safety, and having a lab that is compliant and ready for inspection. The CAP Laboratory Accreditation Process is an internationally recognized program designed to help clinical labs achieve excellence beyond that which is required for regulatory compliance.