The gender gap in Science, Technology, Engineering, and Mathematics (STEM) in Higher Education (HE) can be reduced through institutional efforts; however, the underrepresentation of women is prevalent. There have been efforts to research and implement strategies to increase the number of people attending STEM fields with a specific action to attract and retain women in these areas. The SM focused on published work from 2011 to 2021 indexed in Web of Science or Scopus. Findings show the state of knowledge for an essential topic: reducing the gender gap through guidance and retention strategies to attain completion. Furthermore, descriptive results give a general overview of the area, relevant trends, and other analytical evidence that provides an in-depth understanding of HE institutions’ needs. We conclude that the retention of women studying STEM HE has become an essential issue worldwide universities have addressed increasingly during the last decade.