1. Assisted reproductive technology in the United States: 1999 results generated from the American Society for reproductive medicine/society for assisted reproductive technology registry∗  
Fertility and Sterility 
Volume 78, Issue 5, Pages (November 2002)
DOI: /S (02)

2. FIGURE 1
Annual comparison of IVF delivery rates. Diamonds represent women <35 years of age, squares represent women 35 to 37 years of age, triangles represent women 38 to 40 years of age, and circles represent women >40 years of age.
ASRM/SART. ASRM/SART registry. Fertil Steril 2002.
Fertility and Sterility  , DOI: ( /S (02) )