While women have made significant progress in the work force and in education, gender gaps still exist in many industries and occupations, including science, technology, engineering, and math (STEM) fields. This research aims to understand how undergraduate women negotiate gender within STEM fields, looking specifically at these women's experiences related to gender as they pursue STEM academic majors. The results of the study suggest that (1) the experience of being a woman in a STEM field is different than the experience of being a man; (2) undergraduate women in STEM fields are not necessarily conscious of gender and its potential impact on their experiences; and, (3) the women in the study perceived a certain image of what a woman in a STEM field was expected to look like and how she was expected to behave. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]