The negative feedback you are reading is coming from pregnancy rates of patients in your age group. The evidence suggests if a woman is ovulating and their partner (or donor) has normal sperm quality then IUI or ovulation induction (menopur) cannot increase pregnancy chances, especially in those over age 40. Ovulation induction can be indicated if there is no ovulation. IUI can be indicated if sperm quality is somewhat reduced or sexual intercourse is not applicable. Published IUI success rate over age 42 is 2-5% per insemination.