What this is: a single egg is surrounded by around 50,000 motile (swimming) sperm
How it helps: Used when sperm number and function are normal and fertilization is not suspected to be a problem.
What this is: A single, healthy appearing sperm is injected directly into the cytoplasm of each egg.
How it helps: Used when sperm count or function are abnormal or there are concerns that conventional fertilization may not work.
*Please note: We encourage more than one retrieval for some patients undergoing preimplantation genetic screening and diagnosis prior
to embryo transfer to increase the likelihood of future additional successful pregnancies. This practice may have impacted our results.
**Please note: We perform a significant number of minimal stimulation cycles, which may impact our results.
| Preliminary 20211 SART Success Rates – San Francisco: Live Birth per Intended Egg Retrieval (after all Embryo Transfers) | |||||
| Patient’s Age | <35 | 35-37 | 38-40 | 41-42 | >42 |
| Number of Cycle Starts | 210 | 269 | 295 | 175 | 140 |
| % of Retrievals Resulting in Live Birth | 56.2% | 44.6% | 28.5% | 18.9% | 7.1% |
| vs ALL SART Member Clinics % of Transfers Resulting in Live Birth** | 44.5% | 32.4% | 20.2% | 9.6% | 2.8% |
12021 Preliminary data as reported to the Society for Assisted Reproductive Technologies SART and the federal Centers for Disease Control and Prevention CDC.
Please note: A comparison of clinic success rates may not be meaningful because patient medical characteristics, treatment approaches and entry criteria for SART may vary from clinic to clinic. Learn more about Spring’s SART Data
| LIVE BIRTHS PER INTENDED EGG RETRIEVAL (FIRST EMBRYO TRANSFER) | |||||
| Age of individual | < 35 | 35-37 | 38-40 | 41-42 | > 42 |
| Number of cycle starts | 173 | 179 | 138 | 86 | 32 |
| Singleton Births | 52.6% | 41.9% | 35.5% | 18.6% | 9.4% |
| Live Births | 54.9% | 41.9% | 36.2% | 20.9% | 9.4% |
| (Confidence Range) | (47.5-62.3) | (34.7-49.1) | (28.2-44.3) | (12.3-29.5) | (0 -19.5) |
| Singleton (percentage of live births) | 95.8% | 100% | 98.0% | 16/18 | 3/3 |
| Twins (percentage of live births) | 4.2% | 0% | 2.0% | 2/18 | 0/3 |
| Triplets or more (percentage of live births) | 0% | 0% | 0% | 0/18 | 0/3 |

EXPECTATION OF MATURE EGGS FROM A PATIENT'S AFC
ICSI FERTILIZATION RATE
Fertilized Egg
to Blastocyst Rate
Live Birth Rate after single euploid embryo transfer (PGS)**
*Probability of a normal embryo is directly dependent on age of individual. Age 28: 3/4 “normal” | Age 38*: 2/4 “normal” | Age 42: 1/4 “normal”
**4% anticipated decline from ongoing pregnancy rate to live birth rate