This article is intended to review the effect of mindfulness-based interventions on perinatal mental health. A search of the literature published until September 2019 in the Web of Science (WOS) database was carried out. Taking into account the inclusion and exclusion criteria and after reading the title and abstracts of the articles found, 26 of them have been selected. Finally we only analyzed randomized controlled trials (RCTs) that show data on anxiety, depression, perceived stress and mindfulness before and after intervention and with follow-up data. The results found show that mindfulness-based interventions (IBMs) are more effective than the usual healthcare (TAU) that pregnant women receive for the reduction of depressive, anxious and perceived stress symptoms as well as increasing their postintervention mindfulness levels. For future research, a postpartum follow-up would be considered interesting taking into account variables such as the quality of the mother-baby attachment, adherence to breastfeeding and the evolutionary development of the newborn.