The number of miscarriages that occur each year in the UK are not systematically measured or reported. While some miscarriage‑related data are collected across the four nations, coverage remains limited and does not provide a comprehensive picture of miscarriage prevalence. 

There are opportunities to improve data collection and enable some reporting of miscarriage. However, these efforts are focused mainly on mid‑trimester losses, captured only after women and birthing people are booked into maternity services.  

Further opportunities, such as linking to primary care data and conducting population surveys, could support the development of robust, population‑wide estimates of miscarriage prevalence.