As we celebrate Women’s History Month, it is important to recognize a defining moment in the history of women’s health care in America – the passage of the Affordable Care Act (ACA) 12 years ago this month. This landmark legislation ushered in a decade of expanded and accessible coverage while decreasing health care costs for millions of women in the United States. As the ACA turns another year older, it’s a critical moment to take stock of our progress and reflect on opportunities to better cover women’s needs.