The systematic review discovers in what directions African scholars examine gender gap in STEM in Nigerian universities. The article describes the situation with gender inequality in the Nigerian STEM universities majors. However, African scholars do not discuss it widely. The database of articles published between 2013 and 2023 and (1) published in peer-reviewed journals, (2) related to gender stereotypes in Nigerian tertiary education (3) related to trends and status of women and girls in STEM in Nigeria contains just 15 items. This small number indicates that gender stereotypes are largely responsible for gender gap in STEM enrolment and presents threats to girls already enrolled in male-dominated STEM fields. The influence of the institutional conditions and culture in universities on girls enrolled in male-dominated STEM disciplines presents an understudied theme in the existing literature.