birth control
"I went to a different provider for my birth control, where they gave me Lutera instead of Aviane.  I had been on Aviane for three years with no problems but they did not carry that brand and Lutera was its equivalent.  

I was on Lutera for three months and each month, during my period, I would also get an AWFUL yeast infection.  

After the third infection, I switched back to Aviane and did not get another yeast infection.  The physician said it may have been caused  by a "filler" in the Lutera pill."