{"id":5967,"date":"2014-03-13T11:00:14","date_gmt":"2014-03-13T10:00:14","guid":{"rendered":"https:\/\/www.imferblog.com\/?p=5967"},"modified":"2026-05-10T21:49:40","modified_gmt":"2026-05-10T19:49:40","slug":"y-si-como-pina-tendre-una-nina","status":"publish","type":"post","link":"https:\/\/www.imferblog.com\/?p=5967","title":{"rendered":"Elegir el sexo del beb\u00e9 con la dieta: \u00bfmito o realidad? | IMFER Blog"},"content":{"rendered":"<p>Desde que existe la posibilidad de conocer el sexo del beb\u00e9 durante el embarazo, tambi\u00e9n existe el deseo de poder elegirlo antes. Las teor\u00edas populares que relacionan la alimentaci\u00f3n de la madre con el sexo del hijo llevan d\u00e9cadas circulando, y no muestran se\u00f1ales de desaparecer. En IMFER nos parece \u00fatil analizar qu\u00e9 hay de real en estas propuestas y cu\u00e1les son las opciones que s\u00ed tienen respaldo cient\u00edfico.<\/p>\n<h2>La teor\u00eda de la dieta y el pH cervical<\/h2>\n<p>El libro <em>Elige el sexo de tu hijo seg\u00fan el r\u00e9gimen alimenticio<\/em>, del doctor Fran\u00e7ois Papa y la periodista Fran\u00e7oise Labro, publicado en 1984 y actualizado en varias ocasiones, propone que la alimentaci\u00f3n de la madre puede influir en el sexo del beb\u00e9 a trav\u00e9s de la modificaci\u00f3n del pH del moco cervical. La hip\u00f3tesis es la siguiente: un pH m\u00e1s alcalino (favorecido por una dieta rica en sodio y potasio) facilitar\u00eda el paso de los espermatozoides Y (los que originan ni\u00f1os), mientras que un pH m\u00e1s \u00e1cido (favorecido por calcio y magnesio) favorecer\u00eda a los espermatozoides X (los que originan ni\u00f1as).<\/p>\n<p>Los autores afirman que su m\u00e9todo, seguido con rigor durante al menos dos meses y medio antes del embarazo, tendr\u00eda una eficacia del 87%. Sin embargo, esta cifra nunca ha sido validada en estudios cl\u00ednicos controlados publicados en revistas con revisi\u00f3n por pares. La comunidad cient\u00edfica mantiene un escepticismo justificado: el pH vaginal fluct\u00faa constantemente por m\u00faltiples factores, y los espermatozoides no seleccionan su camino en funci\u00f3n de \u00e9l de forma tan predecible.<\/p>\n<h2>Lo que s\u00ed determina el sexo del beb\u00e9<\/h2>\n<p>El sexo del beb\u00e9 lo determina el cromosoma sexual del espermatozoide que fecunda al \u00f3vulo. Los \u00f3vulos siempre aportan el cromosoma X. Los espermatozoides pueden aportar X (ni\u00f1a) o Y (ni\u00f1o). En una fecundaci\u00f3n natural, la probabilidad de cada opci\u00f3n es estad\u00edsticamente del 50%, aunque existen peque\u00f1as variaciones biol\u00f3gicas en funci\u00f3n de la edad del padre, el orden de nacimiento y otros factores que no son controlables.<\/p>\n<p>Ning\u00fan alimento, postura o momento del ciclo ha demostrado de forma consistente modificar esa proporci\u00f3n. La variabilidad individual y el n\u00famero de ciclos necesarios para que cualquier m\u00e9todo no validado parezca funcionar explican por qu\u00e9 hay personas que creen haberlo conseguido.<\/p>\n<h2>El \u00fanico m\u00e9todo que garantiza la selecci\u00f3n del sexo<\/h2>\n<p>La \u00fanica t\u00e9cnica que permite seleccionar el sexo del embri\u00f3n con certeza es el diagn\u00f3stico gen\u00e9tico preimplantacional (DGP) combinado con fecundaci\u00f3n in vitro. Mediante biopsia embrionaria, es posible identificar los cromosomas sexuales de cada embri\u00f3n y transferir \u00fanicamente los del sexo deseado.<\/p>\n<p>Sin embargo, en Espa\u00f1a la legislaci\u00f3n vigente proh\u00edbe la selecci\u00f3n de embriones por sexo con fines no m\u00e9dicos. Solo est\u00e1 permitida cuando existe una enfermedad hereditaria ligada al cromosoma X, como la hemofilia o la distrofia muscular de Duchenne, donde conocer el sexo del embri\u00f3n es necesario para evitar que el beb\u00e9 nazca enfermo.<\/p>\n<p>Si tienes dudas sobre el diagn\u00f3stico gen\u00e9tico preimplantacional o sobre los tratamientos de <a href=\"\/guia-completa-fecundacion-in-vitro\/\">fecundaci\u00f3n in vitro<\/a> disponibles en IMFER, nuestro equipo est\u00e1 disponible para explicarte todas las opciones.<\/p>\n<p class=\"imfer-article-cta-inline\">\u00bfTienes dudas sobre este tema? <a href=\"https:\/\/www.imfer.com\" target=\"_blank\" rel=\"noopener\">Consulta con nuestros especialistas en IMFER<\/a>.<\/p>\n<p><strong>Tambi\u00e9n puede interesarte:<\/strong> <a href=\"https:\/\/www.imferblog.com\/la-consanguinidad-duplicaba-el-riesgo-de-anomalias-congenitas\/\">Consanguinidad y anomal\u00edas cong\u00e9nitas: riesgos y opciones\u2026<\/a> y <a href=\"https:\/\/www.imferblog.com\/la-consanguinidad-duplicaba-el-riesgo-de-anomalias-congenitas\/\">Consanguinidad y anomal\u00edas cong\u00e9nitas: riesgos y opciones\u2026<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Desde que existe la posibilidad de conocer el sexo del beb\u00e9 durante el embarazo, tambi\u00e9n existe el deseo de poder elegirlo antes. Las teor\u00edas populares que relacionan la alimentaci\u00f3n de la madre con el sexo del hijo llevan d\u00e9cadas circulando, y no muestran se\u00f1ales de desaparecer. En IMFER nos parece &#8230;<\/p>\n","protected":false},"author":1,"featured_media":5968,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1289,7,1302,1286],"class_list":["post-5967","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualidad","tag-actualidad","tag-fertilidad","tag-nutricion-y-fertilidad","tag-reproduccion-asistida","h-entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Elegir el sexo del beb\u00e9 con la dieta | IMFER Blog<\/title>\n<meta name=\"description\" content=\"Algunos libros afirman que la dieta materna influye en el sexo del beb\u00e9. 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