The average monthly pregnancy success rate varies by type of treatment, according to Advanced Fertility Center of Chicago. Using Clomid or Femara yields about a 15 percent success rate, while injectable gonadotropins have a 20 percent success rate. In-vitro fertilization yields a 60 percent success rate.
Women with PCOS do not ovulate regularly, notes Advanced Fertility Center of Chicago. Treatments for PCOS aim to induce ovulation for greater fertility. Pregnancy success rates greatly vary and are dependent on a variety of factors, including the woman's age, the type of medication and whether there are other factors present that may impede fertility. In general, pregnancy resulting from successful treatment is more likely to occur within three to four months of treatment.