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(925) 270-2992

I can’t say enough good things about my experience at Collab. Dr. Segal and the whole team are incredible! From our first meeting I really felt that Dr. Segal listened to my concerns and goals and took the time to get to know me as a person and a patient. Everyone on the team is so kind and compassionate. The level of communication is excellent and far exceeds what I’ve experienced at other fertility clinics in the past. The facility is beautiful and comfortable which is a really nice bonus too!
CASEY S.
My husband and I are absolutely blown away by Collab Fertility and Dr. Segal! From our first meeting, I was immediately struck by her compassion, clear expertise, kindness, and exceptional communication. Having been through the difficult process of IVF for over a year and using two other clinics, I speak from experience that there is NO ONE better than Dr. Segal and her clinic. We hope that through our own experience, others can benefit in their fertility journey like we finally now are.
LISSA AND JUSTIN
Collab Fertility really took care of me from step one to the operating table! Dr. Segal and her staff are so caring and gentle. They really explain every single step so that there is no surprises. They were just so welcoming and kind!! I really can not sing high enough praises to them. I had a wonderful experience working with them and will def be doing so again in the future!
MAY J.
Dr. Thalia Segal is a double-board-certified fertility specialist and a leading voice in reproductive medicine. With more than a decade of experience and thousands of successful outcomes, she’s known for her expertise in IVF, fertility preservation, complex infertility care, and her compassionate bedside manner. Her research on environmental health and reproduction is widely published.
Collab Fertility was honored as Best of the East Bay 2025 by Diablo Magazine for our innovation, patient care, and community impact.We are proud to maintain the highest standards in fertility care through the following accreditations and certifications:


At Collab Fertility, we care for your family-building journey with expertise and compassion. Our services include IVF, IUI, egg and embryo freezing, and fertility testing, along with additional 3rd-party options for specialized needs.
Our personalized IVF programs use advanced lab technology—including ICSI and genetic testing—to help you achieve a healthy pregnancy. All monitoring, egg retrievals, and embryo transfers are performed on-site in our Walnut Creek fertility center.
IUI is a simple, low-intervention treatment that places washed, optimized sperm directly into the uterus. It’s a great option for families with unexplained infertility, mild male factor infertility, and patients using donor sperm.
Our state-of-the-art lab offers egg and embryo freezing. Our team helps you choose the best option based on your fertility goals. Embryo freezing involves fertilizing eggs through IVF before freezing, while egg freezing preserves unfertilized eggs for future fertilization when you're ready.
We offer same-day, on-site fertility testing for women and men, including genetic carrier screening, semen analysis, saline infusion sonogram, tubal patency testing, and ovarian reserve testing. Results are reviewed quickly, so you understand your fertility status and next steps.

State-of-the-art IVF lab

Advanced, on-site, same-day fertility testing for men and women

Cutting-edge genetic testing to identify the healthiest embryos

Integrative care model, The Collab Way, supports your body, mind, and emotional well-being

Welcomes everyone, including single parents and LGBTQIA+ parents



Affordable options. Transparent pricing. No hidden fees.
At Collab Fertility, we’re committed to making fertility care
accessible and stress-free, with clear communication, flexible
financing, and compassionate support every step of the way.
Our financial counselors help you understand and maximize your benefits. In-network with UnitedHealthcare, Cigna, Hill Physicians, Health Net, and Carrot. For other plans, we’ll provide detailed receipts and assist with reimbursement.
Flexible, low-interest payment plans through PatientFi, CapexMD, and Maven Wallet make treatment more manageable. We’ll help you find the best solution so you can focus on your fertility journey, not the paperwork.


A cancer diagnosis shouldn’t mean giving up the chance to build a family. Collab Fertility partners with leading organizations to remove financial barriers to fertility preservation:
The Chick Mission – covers the full cost of fertility
preservation before treatment begins.
Livestrong Fertility – provides eligible patients with free
fertility medications.
Heart Beat Program – offers additional medication support
for patients undergoing cancer treatment.
All patients undergoing cancer-related fertility preservation
also receive a clinic discount.
10% discount for teachers, first responders, and military families. Ready to begin?
Meet our team and explore your personalized
options for fertility care.


We are located in the Shadelands medical hub, 4 minutes from John Muir health.
2700 Ygnacio Valley Rd, Suite 170
Walnut Creek, CA 94598