Here's the Maryland law.
http://law.justia.com/maryland/codes/gin/15-810.html
The infertility has to be associated with endometriosis; exposure in utero to DES; blockage of, or surgical removal of, one or both fallopian tubes; abnormal male factors, including oligospermia, contributing to the infertility
If you have one of these conditions, they have to pay for in vitro if you have been infertile for two years. It doesn't cover treating PCOS with drugs.