This issue brief analyzes how, over the next decade, the Affordable Care Act (ACA) is likely to stabilize and reverse women's growing exposure to health care costs. Up to 15 million women who now are uninsured could gain subsidized coverage under the law. In addition, 14.5 million insured women will benefit from provisions that improve coverage or reduce premiums. Women who have coverage through the individual insurance market and are charged higher premiums than men, who have been unable to secure coverage for the cost of pregnancy, or who have a preexisting health condition excluded from their benefits will ultimately find themselves on a level playing field with men, enjoying a full range of comprehensive benefits.