A study commissioned by RESOLVE, a non-profit patient advocacy organization, states that both three out of four men and three out of four women (in the United States) overestimate by five years the age of the onset of the rapid decline which is at 35 instead of 40 as most people commonly believe.[27] [28] The American Society for Reproductive Medicine (ASRM) states, "...women in their 20's to early 30's are most likely to conceive."[29]