IUI Success Rate • The pregnancy rate per cycle for IUI typically ranges from 10–15% for women under age 35, but it declines with advancing age or other infertility factors. • Cumulative success over several cycles may approach higher rates, but the live birth rate per cycle remains modest. ICSI Success Rate • ICSI (performed as part of IVF) has higher pregnancy and live birth rates per cycle compared to IUI. • The pregnancy rate per cycle for ICSI (and IVF) is often 25–40% for women under age 3