Trusted Embryo Freezing in Oakland

Why Embryo Freezing Is Worth Considering

Embryo freezing gives you the ability to pause time on your fertility. By creating embryos now and storing them safely, you preserve your strongest reproductive years for use later, on your timeline. Many Oakland patients turn to this option when life circumstances, health considerations, or personal goals make it the wrong time to grow a family right now.

There are several reasons patients in Oakland choose to freeze their embryos, including:

Freezing embryos isn’t just a backup plan, but an active decision to protect your options. With vitrification keeping embryos viable for decades, you gain real flexibility around career, relationships, health, and timing without watching the biological clock dictate your choices.

Comparing Egg Freezing and Embryo Freezing

Both egg freezing and embryo freezing preserve fertility for the future, but they’re suited to different stages of life and different family-building goals. The key distinction comes down to whether fertilization occurs before or after thawing, which affects flexibility, success rates, and who the option is best suited for.

Here’s how the two approaches compare at a glance:

• Egg Freezing: Unfertilized eggs are vitrified after retrieval and stored individually. This option keeps your future open if you don’t yet have a partner, are using a sperm donor later, or want maximum flexibility around who you build a family with. Egg quality at the time of freezing is locked in, but fertilization and embryo development happen down the road.
• Embryo Freezing: Eggs are fertilized with sperm shortly after retrieval, allowed to develop in our lab for five to seven days, and then vitrified at the blastocyst stage. Because embryos have already passed early developmental hurdles, survival and pregnancy rates after thaw tend to be higher than with frozen eggs alone.

The right choice depends on where you are right now. If you have a committed partner or a clear plan to use a sperm donor, embryo freezing often delivers stronger outcomes per cycle. If you want to keep your options open, egg freezing at our Oakland clinic may be the better fit. Your Spring Fertility physician will help you weigh the science alongside your personal circumstances.

Our Embryo Freezing Process in Oakland

Our embryo freezing in Oakland follows a carefully structured, step-by-step approach tailored to you. A complete cycle, from consultation to cryopreservation, typically spans about five weeks. Each phase builds on the one before it, and your care team guides you through every appointment, decision, and milestone. Here’s what your embryo freezing timeline in Oakland looks like.

Getting Started With Your Initial Consultation

Your first visit focuses on understanding where you are. Your reproductive endocrinologist will review your medical history, run baseline blood work (including AMH and hormone levels), and perform an ultrasound to assess your ovarian reserve.

From there, your doctor creates a personalized stimulation protocol based on your age, health, and fertility goals. This is not a one-size-fits-all plan. Every detail, from medication type to dosing, is tailored to maximize your results during your embryo-freezing cycle in Oakland.

Helping Your Eggs Grow and Tracking Progress

Once your plan is in place, typically during weeks three and four, you’ll begin injectable fertility medications designed to stimulate your ovaries to produce multiple eggs in a single cycle. These medications, typically gonadotropins such as Follistim or Gonal-F, promote the growth of various follicles at once rather than the single egg your body typically releases.

During this phase, you’ll visit our Oakland clinic every two to three days for monitoring appointments. Your team tracks follicle growth through transvaginal ultrasounds and blood draws, adjusting your medication doses as needed. This close monitoring helps pinpoint the ideal moment for egg retrieval, keeping your cycle on track and your body safe.

Collecting Your Eggs

When your follicles reach the right size, around week five, your doctor administers a “trigger shot” to prepare your eggs for collection. About 36 hours later, you’ll come in for the egg retrieval procedure, a short outpatient appointment performed under light sedation.

The retrieval itself takes roughly 15 to 20 minutes. Your doctor uses ultrasound guidance to aspirate the fluid and eggs from each follicle gently. Most patients rest for about an hour afterward and go home the same day, returning to normal activities within a day or two. 

If your goal is egg freezing rather than embryo creation, your eggs would be vitrified at this stage rather than fertilized.

Fertilization and Embryo Creation

After retrieval, your eggs are moved to our on-site embryology laboratory, where fertilization begins. Depending on your situation, your embryologist may use conventional insemination (placing sperm around the egg) or ICSI (intracytoplasmic sperm injection), where a single sperm is injected directly into a mature egg.

ICSI is often recommended when sperm quality is a concern or when previous IVF cycles have shown lower-than-expected fertilization rates. For patients using donor eggs or donor sperm, the fertilization process follows the same careful protocols. 

Your care team will recommend the approach that gives your embryos the best chance of developing successfully. This step is a defining part of our embryo freezing in Oakland.

Embryo Development and Lab Monitoring

Over the next five to seven days, your embryos grow in our state-of-the-art incubators. Spring Fertility’s laboratory technology is designed to replicate the fallopian tubes’ atmospheric composition at each stage of development, from fertilization through culture and beyond. We were the first fertility center in the country to develop this proprietary system.

Your embryology team evaluates each embryo daily, tracking cell division, symmetry, and overall quality. By day five or six, the strongest embryos typically reach the blastocyst stage, the point at which they’re ready for freezing or genetic testing. 

As part of our embryo freezing in Oakland, we perform PGT (preimplantation genetic testing) to screen embryos for chromosomal abnormalities before cryopreservation, helping your doctor select the healthiest embryo for transfer when you’re ready.

Vitrification and Secure Long-Term Storage

Once your embryos are ready, they undergo vitrification, an ultra-rapid freezing technique that is the gold standard in cryopreservation. During vitrification, the water inside each embryo’s cells is replaced with cryoprotective agents. The embryo is then flash-frozen in liquid nitrogen at -196°C within a single second, forming a stable, glass-like solid rather than damaging ice crystals.

This method achieves approximately 95% embryo survival rates upon thawing. Your frozen embryos are stored in secure, monitored cryogenic tanks at our facility, where all metabolic activity is completely paused. Embryos preserved by vitrification can remain viable for 10, 20, or even longer. 

Your embryo freezing in Oakland cycle is complete once your embryos are safely in storage, and they’ll be here when you’re ready.