Lung ultrasound has been recognized as a valid imaging method for diagnosing and monitoring COVID-19 pneumonia in pregnant women. The present review aimed to summarize the main findings reported in the literature and international guidelines on the role of lung ultrasound in the care of pregnant women affected by COVID-19. A search strategy was developed and applied to PubMed, Scopus, Web of Science and EMBASE to identify previous papers reporting the utility of ultrasound in diagnosing and monitoring COVID-19 pneumonia. The search retrieved 369 articles and 23 of these were selected for analysis. The articles mainly focused on the definition of the procedure, development of training programs for obstetricians managing pregnant women with suspicion of COVID-19 and definition of scoring systems. The clinical applications of lung ultrasound in this setting have also been described. This review could encourage obstetricians to learn lung ultrasound to use during critical events like a pandemic.