This, one thousand times. I majored in biological sciences thinking the work would be interesting and the money would be good. During a summer internship doing research I realized how boring most of the lab work was, and after learning how poorly you were paid even with a masters or a Phd I decided it was not the career for me.
Also worth reading, on related matters: Philip Greenspun's "Women in Science:" <a href="http://philip.greenspun.com/careers/women-in-science" rel="nofollow">http://philip.greenspun.com/careers/women-in-science</a>