Dr. Ophelia Yin is a perinatologist, an obstetrician who specializes in high-risk pregnancies. As an expert in maternal-fetal medicine, she makes prenatal diagnoses of disorders or complications and performs ultrasounds. She has notable expertise in caring for pregnant people who have had a solid organ transplant (including kidney, liver, heart, lung, pancreas, dual-organ and uterine transplants), helping them navigate the preconception, pregnancy and postpartum periods. In collaboration with neurologists, she supports pregnant patients affected by neurological conditions, such as multiple sclerosis, myasthenia gravis, epilepsy, stroke, vascular malformations, aneurysms, and other brain or spine problems. Her experience encompasses managing severe cases of placental disorders, including preeclampsia, and pregnancy-impacting autoimmune disease.

In her research, Yin works with the Transplant Pregnancy Registry International to advance care for transplant patients using a team-based approach. With the UCSF March of Dimes Prematurity Research Center, she investigates how the immune system contributes to complications in pregnancy and conducts translational studies – which apply lab findings to real-world patient care – focused on preeclampsia, placental abnormalities and preterm birth. She has been a scholar in the Chan Zuckerberg Biohub Physician-Scientist Program.

At Princeton University, Yin earned an undergraduate degree in ecology and evolutionary biology, with concentrations in bioengineering and in global health and health policy. She earned her medical degree at the Johns Hopkins University School of Medicine, where she was elected to the Alpha Omega Alpha Honor Medical Society. She completed a residency in obstetrics and gynecology at the University of California, Los Angeles, where she served as administrative chief resident, followed by a fellowship in maternal-fetal medicine at UCSF. During her medical training, she earned awards for community service, teaching, research and patient care. She is active in multiple national medical societies, including the Society for Maternal-Fetal Medicine, Society for Reproductive Investigation and American Society of Transplantation.

Yin grew up in Southern California and loves being back in her home state. Outside of work, she enjoys spending time with her husband, cats, family and friends. She loves nature, reading, traveling, and trying new foods and experiences in San Francisco.