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Dr. Thalia Segal, MD

OBGYN physician, Walnut Creek, CA

Collab Fertility

Dr. Thalia Segal is the founder and Medical Director of Collab Fertility, an East Bay fertility practice.

2700 Ygnacio Valley Rd, Ste 170, Walnut Creek, CA 94598, USA, Walnut Creek, CA 94598

Facts on this page last checked October 2026. How we check doctors

About Dr. Segal

Dr. Segal earned a bachelor's degree at Cornell University and her medical degree at Albert Einstein College of Medicine. She completed her OB/GYN residency at Northwell Health and her reproductive endocrinology and infertility fellowship at Case Western Reserve University and University Hospitals Cleveland Medical Center. She was an Assistant Professor at UCSF Center for Reproductive Health before founding Collab Fertility to address the growing need for quality East Bay fertility care.

She created The Collab Way, an evidence-based, integrative care model that supports both body and mind. Her expertise includes fertility preservation, individualized IVF protocols, preimplantation genetic diagnosis, PCOS, recurrent pregnancy loss, LGBTQ family building, and comprehensive infertility evaluation and treatment. Her research focuses on environmental exposures and reproductive health, including wildfire smoke and plastics.

She is a fertility specialist within the Sutter Health network and has joined the staff at John Muir.

Membership and fees

Fees are not published. Ask the practice.

Services

Fertility preservation Egg and embryo freezing Individualized IVF Preimplantation genetic diagnosis PCOS Recurrent pregnancy loss LGBTQ family building Infertility evaluation and treatment
What reproductive endocrinology and infertility doctors commonly treat

Education and credentials

Degree
MD
College
Cornell University
Medical school
Albert Einstein College of Medicine
Residency
OB/GYN, Northwell Health
Fellowship
Reproductive endocrinology and infertility, Case Western Reserve University and University Hospitals Cleveland Medical Center
Professional memberships
Walnut Creek Wellness Alliance, Society for Reproductive Endocrinology and Infertility Resident Education Committee
NPI
1467751255

Hospital and practice affiliations

Founder and Medical Director, Collab Fertility
John Muir
Sutter Health network
Previously Assistant Professor, UCSF Center for Reproductive Health

Location

2700 Ygnacio Valley Rd, Ste 170, Walnut Creek, CA 94598, USA, Walnut Creek, CA 94598
Collab Fertility practice page
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Recognition and research

Publications

Authored the environmental chapter in the textbook "Reproductive Endocrinology" by Yen & Jaffe.

Teaching and research roles

Her research focuses on the intersection of environmental exposures and reproductive health, including the impact of wildfire smoke on fertility and pregnancy and the impact of plastics on reproductive health.

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Questions patients ask

Where did Dr. Segal train?

She earned her medical degree at Albert Einstein College of Medicine and completed her OB/GYN residency at Northwell Health. She completed a fellowship at Case Western Reserve University and University Hospitals Cleveland Medical Center.

What does Dr. Segal treat?

Her expertise includes fertility preservation, individualized IVF protocols, PCOS, recurrent pregnancy loss and LGBTQ family building.

What is The Collab Way?

It is an evidence-based, integrative care model that supports both body and mind, created by Dr. Segal.

Is Spanish spoken at Collab Fertility?

Spanish is spoken at the clinic.

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