IVF Success Rates

2016 IVF Success Rates for Northern California Fertility Medical Center


  • 2016 Pregnancy Rates per Egg Retrieval

      <35yo 35-37 38-40 >40 Oocyte Recipients
    Total number of egg retrievals 170 79 83 46 42
    No. of patients with at least one embryo transfer 158 59 56 28 39
    Clinical pregnancy rate per egg retrieval 65.2% 55.9% 44.6% 41.4% 92.3%


How to interpret these numbers:

Age (< 35 years old, 35-37, 38-40 and >40) are the age of woman at the time of the egg retrieval.

Total number of egg retrievals: At NCFMC these are the number of egg retrievals that were performed in each age group in 2016.

Number of patients with at least one embryo transfer (fresh embryos or frozen embryo transfer (FET)): At NCFMC these are the number of patients that had at least one embryo placed into the uterus from embryos created in 2016. The embryo(s) transferred may have been fresh or frozen. There are many circumstances when a fresh embryo transfer is NOT recommend and all embryos are cryopreserved for a later frozen embryo transfer, often called a “freeze all cycle,” or “delayed embryo transfer.” Common reasons for a “freeze all” cycle are women with polycystic ovary syndrome (PCOS) or when preimplantation genetic screening (PGS) is performed. Some patients that created embryos in 2016 have not yet had an embryo transfer for various reasons, such as delays due to other medical conditions e.g., breast cancer treatment, traveling out of the country or no normal embryos.

Clinical pregnancy rate per egg retrieval: A clinical pregnancy occurs when the gestational sac is seen in the uterus with ultrasound, as defined by the Society of Assisted Reproductive Technology (SART). A clinical pregnancy is better than a blood or urine pregnancy test but not as good as a “live-birth.” We will not know the actual live-birth rates until 9 months after the last IVF egg retrieval on 12/31/16.

This data does not include the number of embryos transferred (average 1.6 embryos per transfer) or the twin rate, which is around 20% because we perform many elective Single Embryo transfers.

The Society for Assisted Reproductive Technology is the primary organization of professionals dedicated to the practice of Assisted Reproductive Technologies (ART) in the United States. ART includes the practice of In Vitro Fertilization (IVF). The mission of their organization is to set and help maintain the standards for ART in an effort to better serve their members and patients. NCFMC reports to SART.

SART has the latest national and clinic specific IVF results at

Please note: A comparison of clinic success rates may not be meaningful because a patient medical characteristics, treatment approaches and entrance criteria for ART may vary from clinic to clinic. Not all clinics report their data to SART.