The success rate of injectables with intrauterine insemination is 15 percent per cycle for women under the age of 35 with open tubes, no endometriosis and a partner with normal sperm counts, notes the Advanced Fertility Center of Chicago. Women over 40 have a 4 percent chance of success.
Intrauterine insemination with injectables has the greatest chance of success on the first attempt, advises the Advanced Fertility Center of Chicago. There is a significant chance of multiple eggs being fertilized due to the number of eggs produced each cycle. Doctors recommend in vitro fertilization for women over age 40, women who have tubal damage and endometriosis, and couples with male factor infertility.