2007 ART Report Section 1-Overview
Where are U.S. ART clinics located, how many ART cycles did they perform in 2007, and how many infants were born from these ART cycles?
Although ART clinics are located throughout the United States, generally in or near major cities, the greatest number of clinics is in the eastern United States. Figure 1 shows the locations of the 430 reporting clinics. The fertility clinic section of this report, arranged in alphabetical order by state, city, and clinic name, provides specific informaion on each of these clinics. The number of clinics, cycles performed, live-birth deliveries, and infants born as a result of ART all have increased steadily since CDC began collecting this information in 1995 (see Section 5). Because in some cases more than one infant is born during a live-birth delivery (e.g., twins), the total number of infants born is greater than the number of live-birth deliveries. CDC estimates that ART accounts for slightly more than 1% of total U.S. births.
|Number of ART clinics in the United States in 2007||483|
|Number of ART clinics that submitted data in 2007||430|
|Number of ART cycles reported in 2007||142,435*|
|Number of live-birth deliveries resulting from ART cycles started in 2007||43,412|
|Number of infants born as a result of ART cycles carried out in 2007||57,569|
|* Note: This number does not include 95 cycles in which a new treatment procedure was being evaluated (see Figure 2)|
For approximately 72% of ART cycles performed in 2007, fresh nondonor eggs or embryos were used. ART cycles that used frozen nondonor embryos were the next most common type, accounting for approximately 16% of the total. In about 12% of cycles, eggs or embryos were donated by another woman. A very small number of cycles (less than 0.1% of the ART cycles performed in 2007) involved the evaluation of a new treatment procedure. Cycles in which a new treatment procedure was being evaluated are not included in the total number of cycles reported in the national report or in the individual fertility clinic tables. Thus, data presented in subsequent figures in this report and in the individual fertility clinic tables are based on 142,435 ART cycles.
The average age of women using ART services in 2007 was 36. The largest group of women using ART services were women younger than 35, representing 39% of all ART cycles performed in 2007. Twenty-two percent of ART cycles were performed among women aged 35–37, 19% among women aged 38–40, 10% among women aged 41–42, 6% among women aged 43–44, and 5% among women older than 44.
How did the types of ART cycles used in the United States in 2007 differ among women of different ages?
Figure 4 shows that, in 2007, the type of ART cycles varied by the woman’s age. The vast majority (96%) of women younger than 35 used their own eggs, whereas only 4% used donor eggs. In contrast, 36% of women aged 43–44 and three-fourths (75%) of women older than 44 used donor eggs. Across all age groups, more ART cycles using fresh eggs or embryos were performed than cycles using frozen embryos.