1. Assisted reproductive technology in the United States: 2000 results generated from the American Society for Reproductive Medicine/Society for Assisted Reproductive Technology Registry 
Fertility and Sterility 
Volume 81, Issue 5, Pages (May 2004)
DOI: /j.fertnstert

2. FIGURE 1
Annual comparison of IVF delivery rates. Diamonds represent women <35 years of age, squares represent women 35–37 years of age, triangles represent women 38–40 years of age, and X's represent women >40 years of age.
ASRM and SART. ASRM/SART Registry:2000. Fertil Steril 2004.
Fertility and Sterility  , DOI: ( /j.fertnstert )