How are the success rates determined?
Three measures of success are presented in this report: (1) pregnancy, (2) birth of one or more living infants (the delivery of multiple infants is counted as one live birth), and (3) birth of a singleton live-born infant. The pregnancies reported here were diagnosed using an ultrasound procedure. All live-birth deliveries were reported to the ART physician by either the patient or her obstetric provider. Because this report is geared toward patients, the focus is on live birth rates. Singleton live births are presented as a separate measure of success because they have a much lower risk than multiple-infant births for adverse infant health outcomes, including prematurity, low birth weight, disability, and death. Pregnancy, live birth rates, and singleton live birth rates were calculated based on all cycles started.
