Just popping in to answer a question, don't really belong here any more.

Metformin is a drug used to treat PCOS, it helps to reduce the insulin resistance that results in PCOS. For some women, merely taking metformin is enough to fix up a wonky cycle and get ovulation happening.

Clomid is the lext line of attack in PCOS - it attempts to force the body to ovulate by other means.

I guess both are put together because the majority of women on clomid have PCOS, but through the time I've spent watching and participating in this thread, I've encountered many, many women who have used clomid to correct an ovulation problem that do not have PCOS.

Wandering away again now...

BW