Anticoncepción de emergencia en estudiantes mexicanos

objective: to evaluate emergency contraception (ec) knowledge and use as well as identify factors associated to correct ec knowledge among public schools students in morelos, mexico. material and methods: cross-sectional study conducted in 2003-2004 in a sample of 1550 students (ages 14-24). logistic regression was used to identify factors associated to ec correct knowledge. results: among all, 40% were men and 60% women with an average age of 19 years. sixty percent have heard about ec, nevertheless, only 45% have correct knowledge about it; 3% of sexually active students (43%) reported its use. factors associated to ec correct knowledge are: being a woman (or=1.66; ci 1,33, 2,06), being sexually active (or=1.77; ci 1,43, 2,18), middle income (or=1.87; ci 1,04, 3,37), living in a semi-urban zone (or=1.34; ci 1,02, 1,77), drinking alcohol (or=1.78; ci 1,42, 2,22). conclusions: in morelos, adolescents' knowledge of ec is scarce. specific messages regarding its correct use are necessary.