Figure 4. Cumulative live birth rate (CLR) in patients who underwent repeated in vitro fertilization (IVF)-embryo transfer attempts. ^a)A CLR of 40% in 11 IVF cycles at age 40 yr; ^b)19% in 7 IVF cycles at age 41 yr; ^c)17% in 7 IVF cycles at age 42 yr; ^d)3% in 4 IVF cycles at ages 43 and 44 yr (p<0.001).