This instrumental case study explores the messages STEM postdoctoral scholar women received and understood from faculty about having children and an academic career. Of concern, women with children are less likely than men with children or individuals without children to be offered tenure-track positions or to be promoted. This reality suggests academic motherhood is in opposition to professional legitimacy in higher education. Furthermore, postdoctoral scholars who are mothers are more likely than their peers to cite children as their primary reason for not entering the faculty job market. Through inductive and deductive methods, interview transcripts of 22 demographically diverse STEM postdoctoral scholar women were analyzed using the ideal worker conceptual framework. Two themes were identified: (1) messages interpreted as disparaging suggest to STEM postdoctoral women they must sacrifice the choice to have children for an academic career; and (2) messages interpreted as supportive promote the belief that academic motherhood is achievable. These findings illustrate a systemic conflict for STEM postdoctoral scholar women who have children or are considering becoming mothers in the future. Due to disparaging messages from faculty, most interviewees felt the constraints of ideal worker norms; however, through supportive messages from faculty, particularly positive modeling, these women saw the feasibility of having children and a successful academic career without the necessity of conforming to these norms. Inclusive, family friendly higher education policies and practices must be instituted to ensure more women enter and thrive in the STEM professoriate, and women who have or desire to have children are not marginalized.