This study analysed factors associated with unintended pregnancy among
adolescent and young adult women in Santiago, Chile. Three variations
of a behavioural model were developed. Logistic regression showed tha
t the effect of sex education on unintended pregnancy works through th
e use of contraception. Other significant effects were found for varia
bles reflecting socioeconomic status and a woman's acceptance of her s
exuality. The results also suggested that labelling affects measuremen
t of 'unintended' pregnancy.