[Contraception and bioethics: between the conscience objection and the autonomy principle]

In recent years, in all Western societies has changed the paradigm of the physician-patient relationship. It has passed from the principle of beneficence and abscence of malificence to the patients autonomy, recognizing their sovereignty in making clinical decisions that directly affect them. Occasionally, this principle can clash with certain bioethical aspects of conscientious objection for health professionals and providers, primarily in the areas of contraception and abortion. We discussed aspects that support one or another attitude emphasizing issues relating to contraception and induced abortion and the access and use of contraceptive methods by adolescents recognized as "mature minors" to issues of sexuality, particularly in Spain and Mexico.