摘要：This study appeared in full in the last issue of Research Ethics Review (2007; 3(1): 18). Rowena Jones is an obstetrician working in a busy hospital for women. Her research focuses on changes in women's brains during pregnancy 1 . Rowena plans to use magnetic resonance imaging to record images of the brains of women in the second and third trimesters and after birth at 6 and 24 weeks. Her sample consists of two groups of healthy women with uncomplicated and singleton pregnancies, the first primigravid and the second multiparous. There will be a minimum of five and a maximum of ten women in each group.
