Clinical Pregnancy Rate for ISIS Embryo Transfers (ETs) in 2007: 
Overall rate was 38% per embryo transfer (ET) and slightly higher when >9 eggs were retrieved. 2/3 of ETs involved 2 embryos being transferred (34% incidence of twins). 1/3 of ETs involved 3 (rarely 4) embryos being transferred (15% incidence of multiples, 1 set of triplets). Numbers above bars indicate number of cycles reported. ** CP = existence of Fetal Heart at 6 weeks pregnancy.

Clinical Pregnancy (CP) Rate for conventional in vitro fertilization (IVF) versus intracytoplasmic sperm injection (ICSI) in 2007:
Overall rate was virtually identical (37% IVF, 38% ICSI) and was not improved when >9 eggs were retrieved. Numbers above bars indicate number of cycles reported. ** CP = existence of Fetal Heart at 6 weeks pregnancy.

Incidence of Additional Embryos Frozen: 
It is desirable to be able to freeze additional embryos during an IVF/ICSI cycle. However, the stress (on embryos) associated with the freezing process makes it essential to select embryos likely to endure the process and have reasonable potential to establish a pregnancy following storage and thaw. 33% of patients had additional embryos cryopreserved in 2007. The incidence was 51% when patients had at least 10 eggs retrieved. Numbers above bars indicate number of cycles reported.

Clinical Pregnancy Rate for Thaw Embryo Transfers (ETs): 
Overall rate was 24% per ET with single embryos being transferred approximately 20% of the time. Nearly all thaws involved Blastocysts which had been frozen on Day 5 or 6 of fresh cycles. Because of the strict criteria used in selection of embryos for cryopreservation, the success rate is nearly similar for patients <35 and > 35 years of age. Numbers above bars indicate number of cycles reported.