Eric Han, MD

About

Three publications and a completed Yale fellowship put Dr. Eric Han in a specific spot in this practice. He finished obstetrics and gynecology residency at Yale School of Medicine in 2020 and its Reproductive Endocrinology and Infertility fellowship in 2023, after an MD at the University of Connecticut in 2016. He is board-certified in obstetrics and gynecology and board-eligible in reproductive endocrinology and infertility — the status of a physician who has finished REI training and is working toward the subspecialty exam. Patients comparing physicians should read that distinction rather than assume it.

His published work is narrow and useful, which is rarer. A practical guide to oocyte cryopreservation in the Journal of Clinical Medicine sits directly under his egg-freezing practice. A paper in Reproductive Biology and Endocrinology tested anti-Müllerian hormone as a predictor of miscarriage, which is the same hormone clinics use to forecast stimulation response. In Fertility and Sterility he published on cesarean scar defects — the fluid-filled niche left in the uterine muscle after a C-section, increasingly recognized as a cause of abnormal bleeding and impaired implantation, and corrected hysteroscopically. During fellowship he also worked on targeting the IL-6 receptor as a treatment for endometriosis in a mouse model, with that publication pending at the time of his profile.

He practices at the Long Beach campus, which draws patients from Huntington Beach, Garden Grove, Fountain Valley, Seal Beach, Anaheim, Costa Mesa and Newport Beach, and takes monitoring appointments from 7:30 am on weekdays and weekend mornings. His stated approach is to spend the visit on explanation: what a test is for, what the result changes, and why a cycle step is being recommended. He is openly supportive of patients adding holistic and alternative measures for treatment stress alongside medical care, and he is an ASRM and ACOG member.

Clinical Expertise

• Egg freezing / oocyte cryopreservation: stimulation, sedated retrieval and vitrification, and he has published the practical protocol guide on this procedure; the practice reports more than 35,000 eggs frozen across its labs
• Fertility preservation before medical treatment: egg, embryo and sperm freezing coordinated with an oncology or surgical timeline
• Advanced hysteroscopic surgery: uterine septum, polyps, submucosal fibroids, intrauterine adhesions, cesarean scar defects and other cavity problems corrected before a transfer
• IVF and IUI cycle management: stimulation and monitoring, insemination with partner or donor sperm, ovulation induction, ICSI referral when male factor is the issue
• Recurrent implantation failure workup: uterine cavity assessment combined with hormonal and genetic evaluation, informed by his AMH-miscarriage research
• Endometriosis: an active research interest alongside clinical management, with surgical and reproductive options weighed together

Why Choose Dr. Eric Han

He wrote the egg-freezing guide. A practical review of oocyte cryopreservation in a peer-reviewed journal is a concrete credential for the single most requested elective procedure in fertility care.

Surgical skill in the uterus, not just the ovaries. Cesarean scar defects and uterine anomalies are cavity problems that quietly sink transfers; he published on one and lists the other as a focus.

Recent training in current practice. A fellowship completed in 2023 means the lab techniques, culture protocols and PGT workflows he learned are the ones in use now, inside a CAP-accredited lab.

He explains the plan. Time spent on rationale and step-by-step understanding is the explicit organizing principle of his profile, and he is one of the physicians here most open about integrating supportive care with medical treatment.

Professional Affiliations

American College of Obstetricians and Gynecologists; American Society for Reproductive Medicine. Board-certified in Obstetrics and Gynecology; board-eligible in Reproductive Endocrinology and Infertility. Yale School of Medicine residency and fellowship training, University of Connecticut School of Medicine. On staff at Reproductive Partners Medical Group’s Long Beach campus, part of a SART-member practice (clinic ID 2254) with a CAP-accredited embryology laboratory that performs embryo biopsy in house.

Suitable For

• Women freezing eggs, whether for family timing or before medical treatment
• Patients with a prior C-section whose transfer has not implanted, where a scar niche is worth ruling out
• Anyone whose treatment plan includes a uterine procedure and who wants the operator to also manage the cycle
• IUI-first patients who want to try simpler treatment before IVF
• Patients who want the reasoning behind every injection, scan and result written out plainly