Jun 20, 2019 Learn more about the success rates of Clomid, what it is used for, and more. treated with intrauterine insemination (IUI) for unexplained infertility, it was found that pregnancy rate per cycle was: 11.5% for women 35-37 years, 7.3% in women 38-40 years, 4.3% for 41-42 years and 1.0%...