Objective: To gather studies on the effects of the use of medicinal plants during the gestational period, as a way of evidencing the effects caused by consumption. Methodology: The articles were searched in the electronic databases PubMed and Sciello. The articles published in the period 2007 to 2017 were included, using the descriptors: \\\"tea\\\", \\\"medicinal plants\\\", \\\"phytotherapy\\\" and \\\"gestation\\\" or \\\"pregnancy\\\", in Portuguese and English. Results: In the search of articles, 819 results were obtained, of which 39 articles were selected, according to the defined inclusion criteria. Conclusion: Information on the safe use of herbal products during pregnancy is still poorly understood, and further studies of plant species that may pose some risk during pregnancy are needed.