How many IUIs to do? One or two?

This is a question that reproductive endocrinologists have studied and debated since the technique of intrauterine insemination was first developed.

A study reported in the September 2010 issue of Fertility and Sterility again looks at the effect of timing of an IUI on the success rate.

They divided the patients into three groups: patients in group 1 underwent a single preovulatory …