{"id":7488,"date":"2017-04-21T19:19:25","date_gmt":"2017-04-21T17:19:25","guid":{"rendered":"https:\/\/www.imferblog.com\/?p=7488"},"modified":"2026-05-10T21:52:26","modified_gmt":"2026-05-10T19:52:26","slug":"por-que-fracasa-un-tratamiento-de-reproduccion-asistida","status":"publish","type":"post","link":"https:\/\/www.imferblog.com\/?p=7488","title":{"rendered":"Por qu\u00e9 falla un ciclo de FIV: causas y qu\u00e9 hacer | IMFER Blog"},"content":{"rendered":"<p>Uno de los momentos m\u00e1s dif\u00edciles en el camino hacia la maternidad o la paternidad es cuando un ciclo de reproducci\u00f3n asistida no termina en embarazo. Las esperanzas depositadas en ese proceso hacen que el resultado negativo sea emocionalmente muy duro. Pero un ciclo fallido no es un fracaso definitivo: es informaci\u00f3n.<\/p>\n<h2>Causas m\u00e1s frecuentes del fallo en un ciclo de FIV<\/h2>\n<h3>Fallo de fecundaci\u00f3n o desarrollo embrionario<\/h3>\n<p>Incluso con \u00f3vulos y espermatozoides disponibles, la fecundaci\u00f3n puede no producirse o el embri\u00f3n puede dejar de desarrollarse en los primeros d\u00edas. Esto puede deberse a calidad esperm\u00e1tica insuficiente, mala calidad ovocitaria o fallos en el proceso de fecundaci\u00f3n no siempre predecibles.<\/p>\n<h3>Mala calidad embrionaria<\/h3>\n<p>No todos los embriones tienen el mismo potencial de implantaci\u00f3n. Las aneuploid\u00edas (alteraciones cromos\u00f3micas) son especialmente frecuentes en mujeres mayores de 38-40 a\u00f1os y son la causa m\u00e1s com\u00fan de fallo de implantaci\u00f3n y aborto temprano.<\/p>\n<h3>Fallo de implantaci\u00f3n<\/h3>\n<p>A veces el embri\u00f3n es de buena calidad pero no logra implantarse en el endometrio. Las causas pueden estar en el embri\u00f3n (alteraciones gen\u00e9ticas no detectadas sin DGP) o en el \u00fatero: receptividad reducida, p\u00f3lipos, miomas submucosos, trombofilia, alteraciones inmunol\u00f3gicas o hidrosalpinx.<\/p>\n<h3>La edad como factor determinante<\/h3>\n<p>A partir de los 35 a\u00f1os, y especialmente despu\u00e9s de los 40, la calidad ovocitaria disminuye significativamente. Esto se traduce en menores tasas de fecundaci\u00f3n, m\u00e1s embriones con aneuploid\u00edas y mayor probabilidad de fallo de implantaci\u00f3n o aborto.<\/p>\n<h2>Qu\u00e9 se puede hacer tras un fallo<\/h2>\n<ul>\n<li><strong>Diagn\u00f3stico gen\u00e9tico preimplantacional (DGP):<\/strong> permite seleccionar embriones cromos\u00f3micamente normales antes de la transferencia<\/li>\n<li><strong>Estudio de receptividad endometrial (ERA):<\/strong> identifica la ventana de implantaci\u00f3n de cada paciente de forma personalizada<\/li>\n<li><strong>Histeroscopia diagn\u00f3stica:<\/strong> permite visualizar y tratar alteraciones intrauterinas<\/li>\n<li><strong>Cambio de protocolo de estimulaci\u00f3n:<\/strong> ajustar las dosis puede mejorar la respuesta ov\u00e1rica<\/li>\n<li><strong>Valorar la ovodonaci\u00f3n:<\/strong> cuando los fallos se atribuyen a mala calidad ovocitaria y la reserva ov\u00e1rica es muy baja<\/li>\n<\/ul>\n<p>Despu\u00e9s de un ciclo fallido, no hay respuestas universales. En IMFER hacemos una revisi\u00f3n exhaustiva del caso para identificar posibles mejoras antes del siguiente intento. Consulta nuestra <a href=\"\/guia-completa-fecundacion-in-vitro\/\">gu\u00eda completa sobre FIV<\/a>.<\/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\/fsh-lh-fiv-tasa-embarazo-mayores-35-anos\/\">FSH y LH en FIV: mejor tasa de embarazo en mujeres mayores de 35<\/a> y <a href=\"https:\/\/www.imferblog.com\/hormonas-sexuales-hombres-mujeres-similitudes\/\">Hormonas sexuales en hombres y mujeres: lo que compartimos y\u2026<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>El fallo de un ciclo de reproducci\u00f3n asistida es m\u00e1s frecuente de lo que se piensa. Descubre cu\u00e1les son las causas m\u00e1s comunes y qu\u00e9 opciones existen cuando el primer intento no ha funcionado.<\/p>\n","protected":false},"author":1,"featured_media":7489,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1274],"tags":[8,7,77,45],"class_list":["post-7488","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-esterilidad-fertilidad","tag-esterilidad","tag-fertilidad","tag-fiv","tag-infertilidad","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>Por qu\u00e9 falla un ciclo de FIV | IMFER Blog<\/title>\n<meta name=\"description\" content=\"\u00bfPor qu\u00e9 falla un ciclo de FIV? Causas frecuentes: calidad ovocitaria, aneuploid\u00edas, fallo de implantaci\u00f3n y qu\u00e9 hacer en el siguiente intento. 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