This systematic review and meta-synthesis examines 23 qualitative studies on the experiences of motherhood for women with severe mental illness (SMI), and 8 studies on healthcare professionals' perspectives. The review identified two main themes from the women's studies: experiences of motherhood, including feelings of guilt and coping with dual identities; and experiences of services, including stigma. The professionals' studies highlighted discomfort caring for these patients, stigma, a need for more education, and a call for integrated services. The review aims to provide a comprehensive understanding of pregnancy and mothering with SMI to inform improved care.