Should help. Metformin is often first line treatment for pcos, even in women who are not overweight and don't have diabetes. Insulin resistance is usually still a component of pcos which contributes to the menstrual and hormonal irregularities. Metformin increases Insulin sensitivity which is the reason it is such a good medication for pcos.
Not Very. For most women, metformin is no longer considered the first treatment used in pcos women. Actually, there are concerns that it ls less effective than other therapies and may actually increase risk of miscarriage when used alone for ovulation induction. In appropriate pcos patients, it can be useful for other reasons. At this point, most studies shows Clomiphene is the preferred therapy.