PCOS and Pregnancy
While it is possible to become pregnant, women with PCOS tend to suffer a much higher rate of miscarriages. Estimates put the rate of miscarriages in women with PCOS at 45% although some believe the figure may be higher. However, experts aren’t sure why exactly this is. Fertility problems experienced by women with PCOS may be related to the elevated hormone, insulin, or glucose levels, all of which can interfere with implantation as well as development of the embryo. Additionally, abnormal insulin levels may also contribute to poor egg quality, making conception more difficult.
Stabilizing hormone levels can help fertility by promoting ovulation. Some doctors may also prescribe ovulation medications, such as Clomid, to encourage ovulation. If you are thinking of conceiving, be sure to discuss the issue with your doctor. Not all of the medications used to help PCOS sufferers are safe to use during pregnancy and may need to be discontinued.
Although getting pregnant can be problematical for women with PCOS, many have found it easier to get pregnant the second time around. Additionally, some women have found that their menstrual cycles regulate themselves after a pregnancy. Following a healthy diet and exercising regularly will also help to promote fertility.
http://www.pregnancy-info.net/infertility_PCOS.html
PCOS, Pregnancy & Miscarriage rates 
