IVF success rates depend mostly on a woman's age
| 2005 PREGNANCY SUCCESS RATES | ||||||
| Type of Cycle | Age of Woman | |||||
| Fresh Embryos from Nondonor Eggs | <35 | 35–37 | 38–40 | 41–42 | ||
|---|---|---|---|---|---|---|
| Number of cycles | 41,302 | 22,624 | 19,482 | 8,997 | ||
| Percentage of cycles resulting in pregnancies | 43.1 | 35.7 | 26.8 | 17.6 | ||
| Percentage of cycles resulting in live births | 37.3 | 29.5 | 19.7 | 10.6 | ||
| Percentage of retrievals resulting in live births | 40.6 | 33.4 | 23.2 | 13.1 | ||
| Percentage of transfers resulting in live births | 43.4 | 35.9 | 25.4 | 14.9 | ||
| Percentage of transfers resulting in singleton live births | 27.9 | 24.9 | 19.0 | 12.7 | ||
| Percentage of cancellations | 8.2 | 11.8 | 14.8 | 19.0 | ||
| Average number of embryos transferred | 2.4 | 2.6 | 3.0 | 3.2 | ||
| Percentage of pregnancies with twins | 32.9 | 27.3 | 21.5 | 13.4 | ||
| Percentage of pregnancies with triplets or more | 4.4 | 5.0 | 4.4 | 2.5 | ||
| Percentage of live births having multiple infants | 35.6 | 30.9 | 25.1 | 14.5 | ||
| Frozen Embryos from Nondonor Eggs | ||||||
| Number of transfers | 9,575 | 4,801 | 2,896 | 972 | ||
| Percentage of transfers resulting in live births | 31.7 | 27.7 | 23.3 | 15.9 | ||
| Average number of embryos transferred | 2.4 | 2.4 | 2.5 | 2.7 | ||
| All Ages Combined | ||
| Donor Eggs | Fresh Embryos | Frozen Embryos |
|---|---|---|
| Number of transfers | 9,649 | 4,997 |
| Percentage of transfers resulting in live births | 52.3 | 30.9 |
| Average number of embryos transferred | 2.3 | 2.6 |