[Comment] COS-P as an adjunct treatment for perinatal mental health difficulties

Circle of Security-Parenting (COS-P) is an attachment-based parenting intervention typically offered in a group format, utilising videos of families. It focuses on helping caregivers respond to their children's attachment needs.1 It has seen rapid uptake,2 with more than 50 000 facilitators trained worldwide in the condensed COS-P. Research has not been able to keep pace with this prolific uptake, and as a result, there is a paucity of rigorous evidence on the efficacy of COS-P across the varied populations and settings where it is being utilised.