This guideline has been developed to advise on the clinical management of and service provision for antenatal and postnatal mental health. The guideline recommendations have been developed after careful consideration of the best available evidence by a multidisciplinary team of healthcare professionals, women who have experienced mental health problems in the antenatal or postnatal period and guideline methodologists. It is intended that the guideline will be useful to clinicians and service commissioners in providing and planning high-quality care for women with antenatal and postnatal mental health problems while also emphasising the importance of the experience of care for women and their families and carers