Average pregnancy success rates, by age, per cycle of ART
Age Pregnancy rate Live birth rate
22 38.6 36.2
26 43.2 38.1
30 41.3 36.4
34 37.9 32.0
38 29.7 23.2
42 16.0 9.0
46 2.2 1.1
Average 33.0 27.0

Source: Centers for Disease Control and Prevention. Division of Reproductive Health. 2001 Assisted Reproductive Technology Success Rates: National Summary and Fertility Clinic Reports. Atlanta, GA, 2003, Figure 10.

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