Fertility clinic
Stanford Medicine Fertility & Reproductive Health
Sunnyvale, CA · 4.4 mi away
- Under 35
- 34.8% (210 retrievals) live births per intended retrieval
Fertility clinic
Spring Fertility-Silicon Valley
550 Lakeside Dr, Sunnyvale, CA 94085
Spring Fertility-Silicon Valley reported 1,404 ART cycles to the CDC for 2022, above the median of 484 cycles among the 85 CDC-reporting clinics in California. For patients using their own eggs, the CDC published a percentage for patients under 35, 35–37, 38–40 and over 40. The CDC lists donor eggs, donated embryos, embryo cryopreservation, egg cryopreservation and gestational carrier among its services. It is a SART member (Society for Assisted Reproductive Technology).
CDC 2022 · live births per intended egg retrieval · patients under 35, own eggs
52.3%based on 88 intended retrievalsUS average 49.7%
Clinic details
| Address | 550 Lakeside Dr, Sunnyvale, CA 94085 |
|---|---|
| Phone | 415-964-5618 |
| Medical director | Nam D. Tran, MD, PHD |
| CDC clinic status | Open |
| SART member | Yes |
| Lab accreditation verified by CDC | Yes |
| CDC clinic ID | 875 |
| CDC data | CDC data released Dec 18, 2024; fetched Oct 22, 2026 |
CDC report verified by Nam D. Tran, MD, PHD.
Services
- Donor eggs
- Donated embryos
- Embryo cryopreservation
- Egg cryopreservation
- Gestational carrier
Services are the five the CDC asks every clinic to report. Clinics offer more; ask directly.
| Total ART cycles (2022) | 1,404 |
|---|---|
| Fertility preservation cycles (2022) | 422 |
| Pregnancies (2022) | 275 |
| Live-birth deliveries (2022) | 197 |
| Infants born (2022) | 200 |
Success rates by age (2022)
Patients using their own eggs, grouped by the CDC's four age bands. Each cell is the clinic's CDC-reported figure; the smaller “US” line is the national figure for the same cell.
| Measure | Under 35 | 35–37 | 38–40 | Over 40 |
|---|---|---|---|---|
| All patients using their own eggs | ||||
| Live births per intended egg retrieval | 52.3% US 49.7% | 37.7% US 36.3% | 24.2% US 23.1% | 10.7% US 7.7% |
| Singleton live births per intended egg retrieval | 51.1% US 46.7% | 36.4% US 34.5% | 24.2% US 22% | 10.7% US 7.5% |
| Live births per actual egg retrieval | 54.1% US 52.6% | 41.4% US 39.7% | 26.3% US 26.1% | 13% US 9.4% |
| Live births per transfer | 56.1% US 49.1% | 60.4% US 46% | 57.7% US 41.2% | 6 of 13 US 25.4% |
| Singleton live births per transfer | 54.9% US 46.2% | 58.3% US 43.7% | 57.7% US 39.2% | 6 of 13 US 24.5% |
| Average transfers per intended egg retrieval | 0.9 US 1 | 0.6 US 0.8 | 0.4 US 0.6 | 0.2 US 0.3 |
| Average intended egg retrievals per live birth | 1.9 US 2 | 2.7 US 2.8 | 4.1 US 4.3 | 9.3 US 12.9 |
| New patients (no prior ART) using their own eggs: cumulative outcomes | ||||
| New patients: live birth after 1 intended retrieval | 56.2% US 53.4% | 38.2% US 39.9% | 17.5% US 25.4% | 8.6% US 8.5% |
| New patients: live birth after 1 or 2 intended retrievals | 60.3% US 59.6% | 50.9% US 47.6% | 30% US 32.7% | 17.1% US 11.7% |
| New patients: live birth after all intended retrievals | 63% US 60.8% | 52.7% US 49.9% | 37.5% US 35.2% | 17.1% US 13.4% |
| New patients: average intended retrievals per patient | 1.2 US 1.2 | 1.4 US 1.3 | 1.6 US 1.4 | 1.5 US 1.6 |
| Number of cycles behind the rates (2022) | ||||
| Intended egg retrievals | 88 | 77 | 62 | 56 |
| Egg retrievals | 85 | 70 | 57 | 46 |
| Transfers | 82 | 48 | 26 | 13 |
“US” is the CDC national figure for the same measure and group. A value such as “9 of 15” is the CDC's own fraction: the CDC uses fractions for rates with denominators less than 20. It is not converted to a percentage.
Donor eggs and donated embryos (2022)
By egg and embryo source rather than patient age: with donor eggs, the donor's age drives the outcome.
| Measure | Fresh Embryos Fresh Eggs | Fresh Embryos Frozen Eggs | Frozen Embryos | Donated Embryos |
|---|---|---|---|---|
| Live births per transfer | No cycles reported | No cycles reported | 6 of 10 US 45.1% | — |
| Singleton live births per transfer | No cycles reported | No cycles reported | 6 of 10 US 42.8% | — |
| Number of cycles behind the rates (2022) | ||||
| Transfers | 0 | 0 | 10 | — |
“US” is the CDC national figure for the same measure and group. “—”: the CDC published no value. Its asterisk (*) means a reported sample size of 1 through 4, suppressed for privacy, along with any value that could be used to derive it. “No cycles reported”: the CDC reported no cycles meeting this criterion. It prints 0.0 there with that footnote; it is not a 0% success rate and is not compared with the US figure.
Cycle characteristics (2022)
Context for the rates: how often cycles stopped early, and how much of the clinic's practice is frozen transfer, ICSI, PGT, fertility preservation and gestational carriers.
| Measure | Under 35 | 35–37 | 38–40 | Over 40 | All ages |
|---|---|---|---|---|---|
| Intended retrievals with no eggs retrieved | 4.6% | 5.6% | 8.2% | 13.7% | 6.8% |
| Cycles stopped after retrieval, before transfer or banking | 4.9% | 6.6% | 9% | 25.2% | 8.5% |
| Cycles for fertility preservation | 36.5% | 29.3% | 30.9% | 9.3% | 30.1% |
| Transfers using a gestational carrier | 4.4% | 2.4% | 0% | 5.1% | 3.2% |
| Transfers using frozen embryos | 98.9% | 98.4% | 100% | 92.3% | 98.3% |
| Transfers with ICSI | 90.7% | 88.6% | 78.3% | 79.5% | 87.1% |
| Transfers with preimplantation genetic testing (PGT) | 97.8% | 98.4% | 100% | 71.8% | 95.8% |
Reasons patients used ART (2022)
Diagnoses as reported to the CDC; a cycle can have more than one, so the shares add to more than 100%. This is the patient mix behind the rates above.
- Male factor9%
- Endometriosis3%
- Tubal factor2%
- Ovulatory dysfunction7%
- Egg or embryo banking61%
- Recurrent pregnancy loss5%
- Other factor, non-infertility59%
- Unexplained factor21%
What the measures mean
- Intended egg retrieval
- A cycle started “with the plan to retrieve eggs”, counted whether or not any eggs were retrieved, so cancelled cycles stay in the denominator. Rates per intended retrieval are cumulative: they count live births from every embryo transfer within 1 year after that retrieval, fresh or frozen.
- Egg retrieval (actual)
- “A procedure to collect the eggs contained in the ovarian follicles.” Rates per actual retrieval are cumulative in the same way but leave out cycles cancelled before retrieval, so they are never lower than the rate per intended retrieval.
- Transfer
- “Placement of embryos into a woman's uterus through the cervix after IVF.” A rate per transfer counts each transfer on its own, so cycles that never reached a transfer are not in it. It is not always the highest rate: in 2022 the US figure for patients under 35 was 49.1% per transfer against 49.7% per intended retrieval. In the older bands, where many cycles never reach a transfer, it is usually higher (over 40: 25.4% per transfer, 7.7% per intended retrieval).
- Live-birth delivery
- “The delivery of one or more infants with at least one born alive.” A singleton live-birth delivery is “the delivery of a single infant born alive.”
- New patients: cumulative outcomes
- Patients with no prior ART, followed through one, two, or all of their intended retrievals, counting transfers of fresh or frozen embryos from those retrievals. This is the closest the report comes to “my chance of a baby from starting treatment”.
- Age bands
- The CDC groups patients using their own eggs as under 35, 35 to 37, 38 to 40, and over 40, because egg quality falls with the patient's age. Donor-egg rates are not split by age: the donor's age drives them, not the patient's.
Definitions follow the CDC ART glossary and the CDC's guide to interpreting success rates; see the guide to reading the report for worked examples.
Suggest a correction
Moved, renamed, closed, or a phone number that no longer answers? Tell us and we will check it. Work at Spring Fertility-Silicon Valley? Use the same form to claim the page. Success-rate figures cannot be changed here: they come from the CDC report.
Nearby clinics
Fertility clinic
Nova In Vitro Fertilization
Mountain View, CA · 5.0 mi away
- Under 35
- 55% (40 retrievals) live births per intended retrieval
Fertility clinic
Kindbody Silicon Valley
Los Altos, CA · 6.6 mi away
Fertility clinic
CARE for the Bay Area
Los Gatos, CA · 8.7 mi away
- Under 35
- 35.1% (37 retrievals) live births per intended retrieval
Fertility clinic
Bay IVF Center
Palo Alto, CA · 9.3 mi away
- Under 35
- 41.4% (29 retrievals) live births per intended retrieval
More clinics in California
- Palo Alto Medical Foundation · San Jose, CA · 9 mi
- Kaiser Permanente Center for Reproductive Health-Fremont · Fremont, CA · 12 mi
Sources: data.cdc.gov (clinic record, phone, services and clinic profile; fetched Oct 22, 2026) ; data.cdc.gov (clinic profile, cycle counts and cycle characteristics; fetched Oct 22, 2026) ; data.cdc.gov (success rates; fetched Oct 22, 2026) . CDC data released Dec 18, 2024; fetched Oct 22, 2026. Contact details are as the clinic reported them to the CDC for 2022; they were not re-checked with the clinic.