A recent study published in the American Journal of Obstetrics and Gynecology confirms previous studies finding significant increases in the risk of breast cancer in women taking Clomid who could ovulate even without Clomid. If you are ovulating and considering Clomid, there are other options that may be safer. It would be prudent to discuss these with a reproductive medicine specialist.
 
In addition, it is wise to take certain supplements, herbs or eat certain foods to mitigate your risks on Clomid or other hormone therapies. At our office, Steve Gomberg works with a lot of patients undergoing reproductive therapies to help minimize cancer risks. It is always an individualized endeavor, but there are certain herbs and foods that directly inhibit some of the mechanisms cancers use to grow and that can help prevent cells from becoming cancerous (for an in-depth discussion of some of the herbs and strategies, see Breast Cancer and Botanical Medicine. Alternative Medicine Alert. 2008; 2(6) 64-70. Gomberg S, Horn, B.).
 
Am J Obstet Gynecol. 2009 Jan;200(1):72.e1-7.
Breast Cancer Res Treat. 2006 Nov;100(2):201-12. Epub 2006 May 10