This thesis examines the effects of marriage and childbirth on industrial sector location of women in a longitudinal analysis, using the National Longitudinal survey of Labor Market Experience, Young Women File for years 1968 to 1975. Contrary to theoretical assumptions, women, regardless of marital or parental status are found in the same proportions in the monopoly and competitive sectors. Although marriage and childbirth appear not to have any effects on the labor market segmentation of women, the labor markets are remarkably stable. Suggestions for future research and an assessment of labor market segmentation theory are given. / Master of Science