Clomid is one of the most common medications prescribed for female infertility.  But how effective is it?  How long should you take it before moving on to the next step?  According to WebMD:

Effectiveness:Approximately 60% to 80% of women who take clomiphene will ovulate, and about half will be able to get pregnant as a result of taking the drug. Most pregnancies occur within three cycles.

To read the info sheet on Clomid go here.