This study compared the careers of women who graduated from all-girls independent secondary schools to the careers of those who graduated from comparable coeducational schools, in order to determine if there are differences between the career choices of these two groups. Comparisons were made of the number of women in each of 10 traditionally-male fields: medicine; law; engineering; dentistry; veterinary medicine; finance; computers; scientific research; architecture; and psychology. A total of 12,651 alumnae records were screened covering the periods from 1960 to 1985. Results showed that there were very few differences between the careers of graduates of girls' schools and those women graduating from coeducational secondary schools. In those cases where differences did occur, they all favored the coeducational schools. In none of the 10 fields did the graduates of the girls' schools have a proportionately larger number of women, which contradicts other research showing positive effects of girls' schools. Careful consideration of these conclusions is made in light of findings from other studies. Contains 19 references. (GLR)