The number of donor embryo transfers increased as did the likelihood of achieving live birth, according to a recent cohort study that quantified trends in donor embryo cycles in the US from 2000 to 2013. The study reported on transfer, pregnancy, and birth outcomes of donor embryo transfers using data from the CDC’s National ART Surveillance System. Researchers found:

• The annual number of donor embryo transfers significantly increased from 332 to 1,374 among all frozen transfers between 2000 and 2013 (n=391,662).

• Conversely, the proportion of donor embryo transfers among all frozen transfers did not change significantly (2.3% vs 2.6%).

• Both overall pregnancy and live birth rates per frozen donor embryo transfer increased significantly (33.3% to 49.1% and 26.5% to 40.8%, respectively).

• Overall cancellation rate prior to transfer was 7.1% among all initiated donor embryo cycles between 2007 and 2013 (n=7,289).

• Among all transfers between 2007 and 2013 (n=6,773), 3,193 (47.2%) resulted in pregnancy and 2,589 (38.2%) resulted in live birth.

• Among all live births, 1,929 (74.5%) delivered a singleton of which 1,482 (76.8%) were full term and normal birthweight.