Soo is a midwife with a particular research focus on the nature of, and cultures around, normal birth. Soo has undertaken research using a wide range of qualitative and quantitative methods, from phenomenology and ethnography to surveys, RCTs, and epidemiological analysis of large data sets. As well as undertaking research, she teaches on both undergraduate and postgraduate research programmes, and she regularly works with the World Health Organisation and with other research, practice, and public health leaders in maternity care around the world.