Nathaniel Zoneraich, MD, FACOG
Diplomate of American Board of Obstetrics and Gynecology
Dr. Nathaniel Zoneraich grew up in Northern New Jersey and received his undergraduate degree from the prestigious Cornell University. He attended medical school in New York City, NY and received his Doctor of Medicine degree from the world renowned Cornell University Medical College. He completed his residency in Obstetrics and Gynecology at Case Western Reserve University in Cleveland, OH. There he served as Executive Chief Resident during his last year of residency and was awarded Outstanding Resident of Gynecologic Endoscopy by his peers and mentors of the Ob/Gyn Department. Dr. Zoneraich went on to complete his fellowship in Reproductive Endocrinology and Infertility at Emory University in Atlanta, GA.
After fellowship, Dr. Zoneraich moved to the Washington D.C., Virginia and Maryland area and joined Washington Fertility Center, a private fertility clinic where he proved his skills at helping create families. In 2005, Dr. Zoneraich moved to Arizona to open Advanced Fertility Care.
Dr. Zoneraich is Board Certified in Obstetrics and Gynecology and a fellow of the American College of Obstetrics and Gynecology. He is a member of American Society of Reproductive Medicine, Society of Assisted Reproductive Technology, American Medical Association, and Phoenix Ob/Gyn Society.
Dr. Zoneraich’s impressive training and experience has resulted in some of the highest success rates in Arizona as well as the country. Dr. Zoneraich’s special interests include fertility preservation with egg freezing, in vitro fertilization (IVF), donor egg IVF, and advanced hysteroscopic surgery. He is also extremely well known for his compassionate style and warm bedside manner. Dr. Zoneraich is married and lives in Scottsdale with his wife and two children.
Frederick Larsen, MD, FACOG
Diplomate of American Board of Obstetrics and Gynecology
Dr Frederick Larsen grew up in Virginia and received his undergraduate degree from Brigham Young University. He received his M.D. from the University of Virginia School of Medicine in 1994. Following medical school, he completed an OB/GYN residency at Madigan Army Medical Center in Tacoma, Washington. While in residency, he was selected as the Outstanding Senior Resident and was awarded national honors by the American College of OB/GYN for his research. Prior to beginning his fellowship in Reproductive Endocrinology and Infertility at Duke University, he was a practicing OB/GYN generalist for 2 years.
Upon completion of his fellowship in 2003, Dr. Larsen served as Director of Assisted Reproductive Technologies at Walter Reed Army Medical Center in Washington, D.C for five years where he managed over 400 IVF cycles a year and led the clinical training of fellows from the National Institute of Health’s (NIH) Infertility Fellowship. While on faculty of the NIH Infertility fellowship, he was the leading producer of clinical research and focused his research efforts on IVF outcome. Dr. Larsen’s related research has been highly published and presented since 1998.
Dr. Larsen is board-certified in both Reproductive Endocrinology & Infertility and Obstetrics & Gynecology. He is a member of the American Society for Reproductive Medicine, the American College of Obstetricians and Gynecologists, the Society for Assisted Reproductive Technology, and the Phoenix Ob/Gyn Society. Dr. Larsen’s special interests include fertility preservation, in vitrofertilization,hysteroscopic and laparoscopic (including robotic) surgery, tubal reversal surgery and the legal aspects of reproductive medicine. While only having lived in the Valley since 2008, his ties to this area go back over one hundred years. He currently lives in Awhatukee with his wife and 6 children.
Dr. Nicole Kummer, MD, FACOG
Dr. Nicole Kummer is a native of Rochester, Minnesota. She obtained her Bachelor of Science in Genetics and Cell Development at the University of Minnesota. Upon completion of undergraduate studies, she moved to Chicago where she earned her Doctor of Medicine at The Chicago Medical School. She completed her residency in Obstetrics and Gynecology at Yale New Haven Hospital. During residency, she was honored to receive the “Best Laparoscopic Surgeon” award as well as “Best Resident Teacher” award. Dr. Kummer then pursued a fellowship in Reproductive Endocrinology and Infertility at the University of Connecticut before becoming an Assistant Professor in Obstetrics and Gynecology at Yale University. She relocated to Arizona and joined Advanced Fertility Care in 2016.
Dr. Kummer is board certified in Obstetrics and Gynecology and Reproductive Endocrinology and Infertility. She is a member of American Society of Reproductive Medicine.
Dr. Kummer is skilled in the treatment of infertility including ovulation induction, intrauterine insemination, and in vitro fertilization. She also has extensive experience in the evaluation and management of polycystic ovarian syndrome, recurrent pregnancy loss, and pelvic pain as well as surgical management of gynecologic disorders. She is married and lives in Scottsdale with her husband and two children.
Senior Embryologist & Laboratory Supervisor
Sherri Thormahlen is our Senior Embryologist and Lab Supervisor, and she is responsible for all of the day-to-day functions in the laboratory. Sherri joined Advanced Fertility Care with over 14 years of embryology and andrology experience from top IVF programs located in Colorado, Boston, Seattle and most recently Sydney, Australia. Her training by some of the top scientific directors and programs in the field of assisted reproductive technologies result in her expertise in micromanipulation techniques, including: ICSI, IMSI, embryo biopsy, as well as vitrification for cryopreserving all forms of gametes. Sherri is committed to the science and research in the IVF field and has a passion toward its improved success for patients undergoing fertility treatment.
Sherri is an avid outdoorsman who enjoys hiking, biking, climbing, and all sports. She enjoys the great Phoenix weather to pursue these outdoor hobbies!
Joe Conaghan, Ph.D., HCLD
Dr. Joe Conaghan has over 20 years experience working in embryology and andrology laboratories. He is internationally recognized for his work on improving embryo culture conditions.
Dr. Conaghan obtained his Ph.D. in Human Embryology at the University of London, under the direction of Dr. Alan Handyside and Dr. Henry Leese. He spent 7 years at Hammersmith Hospital in London, where he trained in embryology. More recently, he spent 5 years as the IVF laboratory director at the University of California, San Francisco (UCSF) and also serves as the laboratory director of Pacific Fertility Center in San Francisco, CA. He is board certified as a High-complexity Clinical Laboratory Director (HCLD) in the disciplines of Embryology and Andrology.
Dr. Conaghan is a regular faculty member at the American Board of Bioanalysts (ABB) review course. He also sits on the ABB Board of Directors and is the immediate past Chair of the College of Reproductive Biology (CRB). He is a frequent speaker at both the ABB and American Society for Reproductive Medicine (ASRM) annual meetings and he teaches Reproductive Technology at San Francisco State University where he is a faculty member. He participates as a Reproductive Laboratory Inspector for the College of American Pathologists (CAP). Dr. Conaghan is also a current executive member of the board of the Society for Assisted Reproductive Technology (SART) where he represents laboratory directors. He has been a member of ASRM for 15 years and a member of ESHRE for 14 years.
Dr. Conaghan’s interests are in developing programs for the treatment of severe male factor infertility, diagnosis of genetic disease in embryos, improved embryo culture and improving protocols for oocyte and embryo freezing. Dr. Conaghan resides with his wife and 3 children.