Fluid balance monitoring is frequently adopted within high-risk pregnancies but is often limited within midwifery-led care. This audit aimed to review the pre-pregnancy, antenatal and intrapartum oral fluid intake and advice given to low and high-risk service users. Additionally, the audit aimed to review indications for intravenous fluid administration, frequency and accuracy of fluid balance care provided by midwives and the wider multidisciplinary team, and incidence of peripartum hyponatraemia.