Intervention
The intervention is based on the Thinking Healthy Programme [THP-BGV was designed to be integrated into routine antenatal education classes delivered by nurses. The nurses have no formal mental health care training. A training manual was developed with the aim of standardizing the training and delivery procedures [The intervention group received both the routine antenatal sessions and an additional one-hour THP session weekly.The site coordinator informed the participants of their allocation status, and provided information about the on-line delivery platform. A link for each session was shared with the participants by the site coordinator. A WhatsApp group was set up by the designated pregnancy school nurse to remind participants of the date and time of the sessions.Full details of the THP-BGV are available in the adaptation paper [