The Maternal Mental Health Alliance (MMHA) is a charity and coalition of UK organisations with a vision to see all women across the UK get consistent, accessible and quality care and support for their mental health during pregnancy and in the year after giving birth.There is extensive evidence that investing in mental health at this early stage could have a dramatic impact on long-term outcomes for mothers, fathers, children, families and society. Our vision is ‘to improve the lives of mothers and their infants'. We are motivated by the current shortfall in the quality, availability and accessibility of antenatal and postnatal mental health care and the lack of knowledge about this issue amongst health and social work professionals and the wider public.The MMHA currently comprises over 90 organisations, including professional bodies such as Royal Colleges and organisations that represent, advocate for, or provide care and support to parents and families.