Leading IVF Doctors & Specialists
Find the right reproductive specialist
Leading IVF Doctors & Specialists · Inclusion criteria: listed specialists practice at credential-verified, accredited fertility centers. Education, board certification (e.g., ABOG, reproductive endocrinology & infertility fellowship) and years of experience are verified against official hospital records and public licensure registries; patient reviews are manually verified before publication. How we verify doctors
Dr. Kazuto Morozumi
Founder & Director, Morozumi Ladies Clinic
Dr. Kazuto Morozumi is founder and director of Morozumi Ladies Clinic, Tokyo. A co-author of two PNAS ICSI basic-research papers from the University of Hawaii, he has led 10,000+ retrievals and 10,000+ embryo transfers since 2012, with a specialty in advanced-age fertility care.
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Japan 
Dr. Nahathai Paktinun
Obstetrician and Gynaecologist
Dr. Nahathai Paktinun is a reproductive medicine specialist at Bumrungrad International Hospital's Fertility Center. She trained at Cleveland Clinic and the Cleveland IVF Center in the United States, with dual expertise in reproductive endocrinology, minimally invasive gynecological surgery and Embryoscope-based embryo culture.
Thailand 
Nancy A. Klein, MD
Reproductive Endocrinologist
Dr. Nancy Klein co-founded Seattle Reproductive Medicine in 2004 — the practice now operating as Pinnacle Fertility Seattle — and serves as its IVF medical director. With more than 25 years in reproductive medicine, she focuses on donor eggs, ovulation induction and age-related infertility, and has NIH-funded research on female reproductive aging.
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United States 
Dr. Nannapat Parosiyanont
Obstetrician and Gynaecologist
Dr. Nannapat Parosiyanont is a reproductive medicine specialist at V Fertility Center (VFC) inside Vejthani International Hospital in Bangkok. He completed his MD, OB-GYN residency and reproductive medicine fellowship at Chulalongkorn University and is dual board-certified in Obstetrics & Gynecology and Reproductive Medicine.
Thailand 
Napadon Yaibuates, M.D.
Medical Director of CEF Bangkok
Dr. Napadon Yaibuates is Medical Director of CEF Bangkok. He earned his medical degree from the Royal Thai Army Medical College (Phramongkutklao) in 1989 and holds dual qualifications in obstetrics and reproductive medicine, with nearly 30 years of experience in reproductive endocrinology and infertility.
Thailand 
Dr. Naruemit Wonglikitpanya
Reproductive Medicine Specialist
Dr. Naruemit Wonglikitpanya is a reproductive medicine specialist at Millennium IVF Clinic in Bangkok with over 15 years of clinical experience, focusing on female infertility and assisted reproductive technologies including IVF, ICSI and PGT-A.
Thailand 
Natan Bar-Chama, MD
Reproductive Urologist
Natan Bar-Chama, MD, is a board-certified reproductive urologist and has been the Director of the Center for Male Reproductive Health at RMA of New York for 20 years. His clinical and surgical practice is exclusively dedicated to male infertility. He has served as president of both the Society for Male Reproduction and Urology (SMRU) and the Society for the Study of Male Reproduction (SSMR), and received an NIH RO1 research grant.
United States 
Dr. Nathaniel Zoneraich, MD
Medical Director
Nathaniel Zoneraich, MD came to Arizona in 2005 and founded Advanced Fertility Care, which became a founding clinic of Pinnacle Fertility in 2021. His site title is Medical Director, and he serves as the network's Chief Medical Information Officer. He is board-certified in obstetrics and gynecology and sees patients in both Arizona and New York City.
United States 
Dr. Nattharut Kulphaweesuwan
Medical Director
Dr. Nattharut Kulphaweesuwan is Medical Director of SAFE Fertility Group's Gaysorn Amarin flagship branch. Trained at Prince of Songkla University in both obstetrics-gynaecology (2012) and reproductive medicine (2014), she focuses on infertility, reproductive endocrinology and IVF care.
Thailand 
Dr. Navdeep Singh Pannu
Consultant Obstetrician and Gynaecologist
Dr. Navdeep Singh Pannu joined Alpha IVF & Women's Specialists in 2025 after 14 years as Medical Director of TMC Fertility & Women's Specialist Centre. He is a Fellow of the Royal College of Obstetricians and Gynaecologists (FRCOG) and past President of the Malaysian Society for Assisted Reproductive Technology (MSART).
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Malaysia 
Dr. Nikorn Lattirome
Obstetrician and Gynaecologist
Dr. Nikorn Lattirome is Lead Attending Specialist at Legend Fertility Center (LRC) Bangkok, trained at the Royal Thai Army College of Medicine (Phramongkutklao University) with dual Thai board certification in obstetrics-gynaecology and reproductive medicine. He specializes in advanced-age IVF, diminished ovarian reserve and endometriosis-related infertility.
Thailand 
Nina Vyas MD, FACOG
OB-GYN
Dr. Nina Vyas is an OB-GYN and reproductive endocrinologist at Pinnacle Fertility Los Angeles (formerly California Fertility Partners). She trained at UCLA and Weill Cornell, has authored nine peer-reviewed publications, was named a Super Doctors Southern California Rising Star 2025, and practices in English and Spanish.
United States Showing 301-311 of 963
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