title: [Methodology of teaching natural methods of birth regulation (special reference to the Billings ovulation method].
mesh_terms: D001831:Body Temperature; D002582:Cervix Mucus; D005260:Female; D006266:Health Education; D006801:Humans; D008297:Male; D012252:Natural Family Planning Methods; D010061:Ovulation Detection / Q000379:methods; D013664:Teaching Materials
vernacular_title: Metodología de enseñanza de los métodos naturales de regulación de la natalidad (especial referencia al método de ovulación de Billings).