El aborto es un tema debatido desde hace décadas. En España actualmente se propone cambiar a un sistema de aborto a petición de la embarazada en un plazo, manteniendo dos indicaciones durante más tiempo. El presente artículo analiza el contenido de la salud sexual y reproductiva, los derechos de la mujer y la protección del no nacido en el derecho Internacional. También estudia la jurisprudencia constitucional española y la diferencia sustancial del sistema de plazos, la ética médica al respecto y las exigencias del consentimiento informado. Finalmente se trata el problema del consentimiento de los menores a la unión sexual y al aborto.Abortion is an issue that has been discussed for decades. Nowadays a new abortion onrequest system is being discussed for implementation in Spain, keeping two of the previous assumptions for longer. This article analyzes the content of sexual and reproductive health, women's rights and the protection of the unborn under International Law. Besides, it studies the constitutional Spanish jurisprudence and the essential difference that a system based on terms sets, the medical ethics concerning this matter and the requirements of the informed consent. Eventually, the article deals with the problem of the minors' consent for sexual union and abortion. previous assumptions for longer. This article analyzes the content of sexual and reproductive health, women's rights and the protection of the unborn under International Law. Besides, it studies the constitutional Spanish jurisprudence and the essential difference that a system based on terms sets, the medical ethics concerning this matter and the requirements of the informed consent. Eventually, the article deals with the problem of the minors' consent for sexual union and abortion.gmarsalcarmen@yahoo.essemestral