Our Scientific and Medical Team:
Masahide Shiotani, MD, PhD
Asian Egg Bank Co-Founder
Dr. Masahide Shiotani is the co-founder of Asian Egg Bank and Hanabusa
IVF and owner of several fertility clinics in Japan. His medical career
began not long after graduating from the Shimane University School of
Medicine. He began working at the Kyoto University Hospital Department
of Gynecology and Obstetrics and soon joined the IVF team where he began
researching infertility, specifically the implantation process of the
After gaining a wealth of experience in the fertility field, Dr. Shiotani
spent six years working at the Kobe City Medical Center General Hospital.
While there, he had success with the first ICSI baby in Hyogo Prefecture.
After working in fertility practices, he opened his original clinic, the
Hanabusa Women’s Clinic, in Tarumi. Over the following decade, he
went on to open two more women’s clinics in Sannomiya.
Now, Dr. Shiotani manages three, thriving fertility clinics and helps to
run the Hanabusa IVF clinic in San Diego. His years of experience and
research in the field of fertility can now be used to benefit people in
both the United States and Japan.
Lisa Nelson, MSc., ELD (ABB), EMB (ACE)
Embryology Laboratory Director
Lisa Nelson has an extensive embryology background with over 25 years of
experience and has performed thousands of successful IVF cycles in her
Lisa received her undergraduate degree from Cal Poly Pomona in Animal Science
and her Master’s degree in Biomedical Sciences from Eastern Virginia
Medical School. She is board certified as an Embryology Laboratory Director,
certified by the American Board of Bioanalysts and an Embryologist, certified
by the American College of Embryology. She is highly skilled in all the
latest, state-of-the-art techniques of laboratory management, embryo and
blastocyst culture, micromanipulation and cryopreservation/thaw techniques,
including oocyte freezing for fertility preservation. She has performed
many successful cases involving embryo biopsy and fixation for preimplantation
genetic screening (PGS).
Additionally, her andrology skills include processing and cryopreservation
of testicular and epididymal sperm for use in the treatment of severe
male infertility. She is the president of the Southern California Assisted
Reproductive Biologists, a member of both the American Society of Reproductive
Medicine and the American Board of Bioanalysts and serves as a laboratory
inspector for the College of American Pathologists. In her free time,
Lisa serves as Vice President of Nurtured by Nature, a non-profit dedicated
to connecting children to animals and nature. She also offers her time
and embryology skills to the Institute for Conservation Research-San Diego
Zoo, which fights against the extinction of endangered species.
Yuan Cheng, PhD
Senior Embryologist – Research Coordinator
Yuan Cheng earned her PhD from the University of Tokyo and then worked
as a postdoctoral fellow at Stanford University. Yuan’s research
focuses on the ovary, and she discovered the underlying mechanisms of
ovarian wedge resection, a discovery leading to the development of a new
infertility treatment called “In-Vitro Activation” or IVA.
Time Magazine named IVA a top-10 medical breakthrough of 2013, and it is currently in
clinical trials. Patients with Primary Ovarian Insufficiency (POI) who
have been treated with IVA have given birth to several healthy babies.
Yuan completed her training in Hanabusa Women’s Clinic in Kobe, and
she is fluent in Chinese, Japanese and English. She is the author of several
research studies published in leading fertility journals, and she holds
a number of honors, including Lalor Foundation, Hirore and Takenaka Fellowships.
Lizeth Barrientos, MSc
Lizeth Barrientos, a Laboratory Supervisor at Hanabusa IVF, earned her
MSc degree from the Monterrey Institute of Technology and Higher Education.
She also holds a BSc degree from the University of Guadalajara. She completed
her training at New Hope Fertility Center (NHFC) in New York where she
developed her excellent embryology skills. Lizeth then went on to be the
Laboratory Director of NHFC, Guadalajara (2009-2015) and a Laboratory
Consultant at NHFC, Mexico City (2014-2015) before joining Hanabusa IVF
in 2016. She assisted with the design and set up of the first Mini IVF
laboratory in Guadalajara, and was directly involved with the design,
equipment selection and set up of the most modern embryology and andrology
laboratory in Mexico City.
Lizeth is a member of the American Society for Reproductive Medicine, the
American Association of Bioanalysis, the Southern California Assisted
Reproductive Biologists, the Fertility and Sterility Journal Club Global,
and the Genetic Summit Journal Club Live. She is also an applicant for
AAB certification as Technical Supervisor. Lizeth is also coauthor of
the first Mini IVF book,
Textbook of Minimal Stimulation IVF.