Our Clinic Team

San Francisco Birth Center is committed to comprehensive, intimate, holistic midwifery care. Our midwives have chosen to work at SF Birth Center because this setting offers a unique opportunity to provide care in a way that encourages personal hands-on interaction and collaborative decision-making. Our greatest joys are watching people become empowered by birth and helping to build healthy families.

Kelly Wong McGrath


Clinical Director

Kelly is a Certified Nurse-Midwife and an Adult-Gerontology Nurse Practitioner. Kelly started her career in health care as an NP, providing primary care services to San Francisco’s low-income and transitionally housed populations. While she loved her work, Kelly found herself so inspired by the two beautiful homebirths of her daughters that she decided to become a midwife herself. Kelly is passionate about childbirth education and informed consent and her goal for all families is to experience pregnancy and birth as a time of empowerment. 

Born and raised in San Francisco, Kelly spends a lot of her free time with her large extended family. She loves to knit, read, make messy art with her kiddos, and find new places to eat noodle soups.

Mason Wilson-Tanev 


Mason Wilson-Tanev comes to us with over 20 years of experience catching babies. She initially trained at a birth center in the East Bay and has had an active home birth practice since 2001. She received her Masters in Anthropology and has begun a PhD program focused on new methods of supporting folks with a history of birth trauma. She is also trained in massage therapy, hypnotherapy, IBS FODMAP counseling, and lactation counseling.

Maria Rivera

Maria Rivera


Maria Rivera is a Licensed Midwife and Indigenous Partera with a mission on Earth to support the sacred transitions of humans from birth and beyond. For the past 13 years she has been dedicated to the praxis of reclaiming ancestral birth practices and bridging them with modern day evidence-based midwifery. She feels honored to have attended hundreds of births in various settings such as homebirth, hospitals, and birth centers. Her vision is to safeguard the ceremony of birth and to support the well being of current & future generations. Maria understands the importance of compassionate and dignified health care and is looking forward to helping you make empowering informed decisions.

Nancy Myrick



Nancy Myrick is a Certified Nurse-Midwife and has been the director of San Francisco Birth Center since 2015. She has practiced home birth midwifery since 2003 with Rites of Passage Midwifery. Nancy began attending births as a doula in 1993, received her RN in 2000, and completed her training in midwifery in 2003 through the UCSF Nurse Midwifery Education Program. She has attended hundreds of births in homes, birth centers, and hospitals and believes that choice in childbirth helps parents begin the long path toward building great humans!

Sara Van Acker


Financial Director

Sara is a Certified Nurse-Midwife and Women’s Health Nurse Practitioner who completed her training at UCSF. Her path to midwifery began as a doula at San Francisco General Hospital and has included various international and domestic projects, including a midwifery fellowship at Holy Family Birth Services in Weslaco, TX and as a nurse-midwife at Santa Rosa Birth Center. Sara’s practice is rooted in the strong belief that families deserve holistic, client-centered choices for their birth and reproductive health care services, and she is overjoyed to have co-founded San Francisco Birth Center as an alternative option to childbearing families in San Francisco. Sara is also mama to two girls, experiences that have deepened her commitment to supporting families through the transitions of parenthood.


Alexa Almira

Office & Medical Assistant

Alexa is passionate about reproductive rights, education, and informed decision-making. She graduated from San Francisco State University with a BS in Technical & Professional Writing, which she uses to help folks gain better access to information and resources they need to make informed choices about their body and mind in healthcare settings. She is incredibly thankful to SF Birth Center for welcoming her into a precious family of not just midwives, but beautiful parents and parents to be. Alexa spends her free time as a lightboard operator for shows and competes in Tahitian Drum competitions.

Maddison McCauley

Social Media & Admin Assistant

Maddison has a passion for women’s health and birth work. She completed her degree in Public Health from American University in Washington D.C. Maddison is a certified Birth Doula, Placenta Encapsulater, and Childbirth Educator. When not at the birth center, she can typically be found drinking good coffee, binge reading books in one night, and hanging out with her baby girls, cat, and handsome husband. With a background in Financial Institutions and Marketing, Maddison is very excited to “get in to the birth world.” She is so thankful for the opportunity to meet and work with the lovely parents (and parents to be) of SF Birth Center.

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Proud Member of AABC

2300 Sutter St. Suite 301

San Francisco, CA 94115