Ucyigit MS, et al. - Researchers here examined how the Ambulatory Hyperemesis Unit at an inner-city teaching hospital, since its establishment in 2012, has influenced both the inpatient admission rate and length of stay for hyperemesis gravidarum. In addition, they sought to report on the financial impact of this service on the hospital trust. They conducted a retrospective observational analysis, spanning a 12 year period, at King’s College Hospital, London, and identified the average number of inpatient spells per year before and after the unit opened of 243.25 and 254.13 spells, respectively. Overall findings suggested no alteration in the total number of inpatient admissions after establishment of the outpatient services, however, there were significant reductions in the length of stay per patient admission and total number of inpatient nights per year. This benefit remained sustained over many years, and is possibly because of the focused and accessible aftercare the ambulatory hyperemesis unit gives. As a consequence, a substantial estimated cost-saving to the hospital trust, of almost £100,000 per year, was identified.