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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Control de natalidad</topic></authority><related type="narrower"><topic>Anticonceptivos</topic></related><related type="narrower"><topic>Vasectomía</topic></related><related type="other"><topic>Higiene sexual</topic></related><related type="other"><topic>Planificación familiar</topic></related><related type="other"><topic>Eugenesia</topic></related><related type="other"><topic>Ética sexual</topic></related><related type="other"><topic>Política demográfica</topic></related><related type="other"><topic>Natalidad</topic></related><related type="other"><topic>Aborto</topic></related></mads>