{"id":2063,"date":"2025-10-20T19:00:56","date_gmt":"2025-10-20T23:00:56","guid":{"rendered":"https:\/\/androfertilidad.com\/?p=2063"},"modified":"2025-10-18T00:32:58","modified_gmt":"2025-10-18T04:32:58","slug":"cribado-genetico-preconcepcional","status":"publish","type":"post","link":"https:\/\/androfertilidad.com\/en\/andrologia\/cribado-genetico-preconcepcional\/","title":{"rendered":"Cribado Gen\u00e9tico Preconcepcional"},"content":{"rendered":"<div style=\"max-width: 900px; margin: 0 auto; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6;\">\n<p><!-- T\u00edtulo con cita de fuente --><\/p>\n<h1 style=\"color: #2c5282; border-bottom: 3px solid #4299e1; padding-bottom: 10px; margin-bottom: 20px;\">\ud83e\uddec Cribado Gen\u00e9tico Preconcepcional (ACMG 2021) \u00b7 <span style=\"font-size: 16px; color: #334155;\">Fuente: Gregg AR, et&nbsp;al., Genetics in Medicine (DOI: 10.1038\/s41436-021-01203-z)<\/span><\/h1>\n<p><!-- Banda destacada + bot\u00f3n descarga art\u00edculo --><\/p>\n<div style=\"display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 15px; border-radius: 10px; margin-bottom: 20px;\">\n<div>\n<p style=\"margin: 0; font-size: 16px;\">\ud83d\udcd6 <strong>Tiempo de lectura:<\/strong> 5 minutos<\/p>\n<p style=\"margin: 5px 0 0 0; font-size: 14px;\">Recomendaciones oficiales del American College of Medical Genetics and Genomics (ACMG)<\/p>\n<\/div>\n<div><a style=\"display: inline-block; background: #1f2937; color: #fff; text-decoration: none; font-weight: bold; padding: 10px 14px; border-radius: 8px;\" href=\"https:\/\/www.nature.com\/articles\/s41436-021-01203-z\" target=\"_blank\" rel=\"noopener noreferrer\"><br \/>\n\u2b07\ufe0f Ver\/Descargar art\u00edculo (Nature)<br \/>\n<\/a><\/div>\n<\/div>\n<p><!-- Definici\u00f3n: Cribado --><\/p>\n<div style=\"background-color: #f0f9ff; border-left: 4px solid #0284c7; padding: 20px; margin-bottom: 25px; border-radius: 8px;\">\n<h2 style=\"color: #0c4a6e; margin-top: 0;\">\ud83d\udcda \u00bfQu\u00e9 es el \u201ccribado\u201d gen\u00e9tico de portadores?<\/h2>\n<p style=\"color: #334155; margin: 0;\"><strong>Cribado gen\u00e9tico<\/strong> es la evaluaci\u00f3n, preferiblemente <em>antes del embarazo<\/em>, para identificar si una persona porta variantes patog\u00e9nicas en genes asociados a<br \/>\nenfermedades <strong>autos\u00f3micas recesivas<\/strong> o <strong>ligadas al X<\/strong>. No diagnostica enfermedad en la persona cribada: estima el riesgo reproductivo para su descendencia.<\/p>\n<\/div>\n<p><!-- Definici\u00f3n: Portador --><\/p>\n<div style=\"background-color: #eef2ff; border-left: 4px solid #6366f1; padding: 18px; margin-bottom: 22px; border-radius: 8px;\">\n<h2 style=\"color: #312e81; margin-top: 0;\">\ud83e\udde9 \u00bfQu\u00e9 significa \u201cser portador\u201d?<\/h2>\n<p style=\"color: #1e293b; margin: 0;\">Ser <strong>portador<\/strong> implica tener una copia alterada de un gen sin manifestar s\u00edntomas. Si ambos miembros de la pareja son portadores del mismo gen recesivo,<br \/>\nexiste un <strong>25&nbsp;%<\/strong> de probabilidad de que el hijo est\u00e9 afectado, <strong>50&nbsp;%<\/strong> de que sea portador y <strong>25&nbsp;%<\/strong> de no heredar la variante.<\/p>\n<\/div>\n<p><!-- Definici\u00f3n: Estudios gen\u00e9ticos NGS --><\/p>\n<div style=\"background: #fff7ed; border-left: 4px solid #ea580c; padding: 18px; margin-bottom: 22px; border-radius: 8px;\">\n<h2 style=\"color: #7c2d12; margin-top: 0;\">\ud83e\uddea \u00bfQu\u00e9 son los estudios gen\u00e9ticos por NGS?<\/h2>\n<p style=\"color: #7c2d12; margin: 0;\">La <strong>secuenciaci\u00f3n de nueva generaci\u00f3n (NGS)<\/strong> permite analizar m\u00faltiples genes simult\u00e1neamente con alta sensibilidad a un costo contenido, habilitando<br \/>\n<strong>paneles de cribado<\/strong> que incluyen decenas a cientos de genes relevantes para la salud reproductiva.<\/p>\n<\/div>\n<p><!-- Sistema de Niveles (tabla ordenada) --><\/p>\n<h2 style=\"color: #2c5282; margin-top: 30px;\">\ud83d\udcca Sistema de Niveles (Tiers) \u2014 ACMG<\/h2>\n<div style=\"overflow-x: auto; margin-bottom: 20px;\">\n<table style=\"width: 100%; border-collapse: collapse; background: #ffffff; border: 1px solid #e5e7eb; border-radius: 10px; overflow: hidden;\" role=\"table\">\n<thead>\n<tr style=\"background: #f8fafc;\">\n<th style=\"text-align: left; padding: 12px; border-bottom: 1px solid #e5e7eb; color: #0f172a;\">Nivel<\/th>\n<th style=\"text-align: left; padding: 12px; border-bottom: 1px solid #e5e7eb; color: #0f172a;\">Definici\u00f3n<\/th>\n<th style=\"text-align: left; padding: 12px; border-bottom: 1px solid #e5e7eb; color: #0f172a;\">Criterio de frecuencia<\/th>\n<th style=\"text-align: left; padding: 12px; border-bottom: 1px solid #e5e7eb; color: #0f172a;\">Ejemplos<\/th>\n<th style=\"text-align: left; padding: 12px; border-bottom: 1px solid #e5e7eb; color: #0f172a;\">Cu\u00e1ndo usar<\/th>\n<\/tr>\n<\/thead>\n<tbody><!-- Tier 1 --><\/p>\n<tr>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\"><strong>\ud83d\udfe2 Tier 1<\/strong><\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\">M\u00ednimo tradicional<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\">\u2014<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\"><strong>CFTR<\/strong> (fibrosis qu\u00edstica), <strong>SMN1<\/strong> (atrofia muscular espinal)<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\">Hist\u00f3rico como base m\u00ednima; no se recomienda como estrategia universal \u00fanica<\/td>\n<\/tr>\n<p><!-- Tier 2 --><\/p>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"><strong>\ud83d\udd35 Tier 2<\/strong><\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\">Panel moderado<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\">\u2265 1\/100<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\"><strong>HBB<\/strong> (anemia falciforme\/\u03b2-talasemia), <strong>PAH<\/strong> (fenilcetonuria)<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #e5e7eb;\">Enfoques dirigidos; hist\u00f3ricamente impulsado por ACOG<\/td>\n<\/tr>\n<p><!-- Tier 3 --><\/p>\n<tr>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\"><strong>\ud83d\udfe3 Tier 3<\/strong><\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\">Est\u00e1ndar recomendado universal<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\">\u2265 1\/200<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\">~97 genes AR + 16 ligados al X (p.ej., <strong>GJB2<\/strong>, <strong>HEXA<\/strong>, <strong>F8<\/strong>, <strong>DMD<\/strong>)<\/td>\n<td style=\"padding: 12px; border-bottom: 1px solid #f1f5f9;\"><strong>Ofrecer a todas<\/strong> las parejas que planifican embarazo y a embarazadas<\/td>\n<\/tr>\n<p><!-- Tier 4 --><\/p>\n<tr style=\"background: #f8fafc;\">\n<td style=\"padding: 12px;\"><strong>\ud83d\udfe0 Tier 4<\/strong><\/td>\n<td style=\"padding: 12px;\">Muy amplio\/condiciones raras<\/td>\n<td style=\"padding: 12px;\">&lt; 1\/200<\/td>\n<td style=\"padding: 12px;\">Errores cong\u00e9nitos del metabolismo y otras condiciones raras<\/td>\n<td style=\"padding: 12px;\">Casos especiales: <em>consanguinidad<\/em>, <em>historia familiar<\/em> o <em>preferencia informada<\/em>; no de rutina<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- Recomendaciones oficiales --><\/p>\n<h2 style=\"color: #2c5282; margin-top: 30px;\">\ud83d\udccb Recomendaciones clave (ACMG 2021)<\/h2>\n<div style=\"background: #dcfce7; border: 2px solid #22c55e; border-radius: 10px; padding: 20px; margin-bottom: 15px;\">\n<h3 style=\"color: #14532d; margin-top: 0;\">\u2705 Recomienda:<\/h3>\n<ul style=\"color: #166534; margin: 0 0 0 18px;\">\n<li style=\"margin-bottom: 8px;\"><strong>Ofrecer Tier 3 a TODAS<\/strong> las embarazadas y parejas que planifican embarazo<\/li>\n<li style=\"margin-bottom: 8px;\">Enfoque <strong>\u00e9tnica\/poblacionalmente neutral<\/strong> (no basado en origen \u00e9tnico)<\/li>\n<li style=\"margin-bottom: 8px;\"><strong>Incluir a la pareja<\/strong> cuando sea posible (cribado en paralelo o secuencial)<\/li>\n<li style=\"margin-bottom: 8px;\"><strong>Consejo gen\u00e9tico<\/strong> pre y post-test por profesionales capacitados<\/li>\n<li style=\"margin-bottom: 0;\"><strong>Considerar Tier 4<\/strong> solo en situaciones especiales (consanguinidad, historia familiar)<\/li>\n<\/ul>\n<\/div>\n<div style=\"background: #fef2f2; border: 2px solid #ef4444; border-radius: 10px; padding: 20px; margin-bottom: 15px;\">\n<h3 style=\"color: #7f1d1d; margin-top: 0;\">\u274c No recomienda:<\/h3>\n<ul style=\"color: #991b1b; margin: 0 0 0 18px;\">\n<li style=\"margin-bottom: 8px;\">Usar <strong>solo Tier 1 o 2<\/strong> como estrategia universal<\/li>\n<li style=\"margin-bottom: 8px;\">Realizar <strong>Tier 4 de rutina<\/strong> sin indicaci\u00f3n<\/li>\n<li style=\"margin-bottom: 0;\"><strong>Baso<\/strong> del cribado en etnicidad autorreportada como \u00fanico criterio<\/li>\n<\/ul>\n<\/div>\n<p><!-- Elementos del asesoramiento --><\/p>\n<h2 style=\"color: #2c5282; margin-top: 30px;\">\ud83d\udcdd Elementos clave del asesoramiento<\/h2>\n<div style=\"background: #fef3c7; border: 1px solid #f59e0b; border-radius: 10px; padding: 20px; margin-bottom: 20px;\">\n<h3 style=\"color: #78350f; margin-top: 0;\">Antes del test<\/h3>\n<ul style=\"color: #92400e; margin: 0 0 0 18px;\">\n<li>Voluntario y preferible <strong>preconcepcional<\/strong><\/li>\n<li>No detecta <strong>todas<\/strong> las condiciones gen\u00e9ticas<\/li>\n<li>Resultado negativo <strong>reduce<\/strong> pero no elimina el riesgo<\/li>\n<\/ul>\n<h3 style=\"color: #78350f; margin: 16px 0 6px 0;\">Si ambos son portadores<\/h3>\n<ol style=\"color: #92400e; margin: 0 0 0 18px;\">\n<li><strong>FIV + PGT<\/strong> (diagn\u00f3stico gen\u00e9tico preimplantacional)<\/li>\n<li><strong>Diagn\u00f3stico prenatal<\/strong> (CVS\/amnio) seg\u00fan gestaci\u00f3n<\/li>\n<li><strong>Gametos donados<\/strong> o <strong>adopci\u00f3n<\/strong><\/li>\n<li><strong>Preparaci\u00f3n<\/strong> para cuidados especializados<\/li>\n<\/ol>\n<\/div>\n<p><!-- Resultados de laboratorio --><\/p>\n<div style=\"background: #e0e7ff; border: 1px solid #6366f1; border-radius: 10px; padding: 20px; margin-bottom: 20px;\">\n<h3 style=\"color: #312e81; margin-top: 0;\">\ud83d\udcca Informe del laboratorio (qu\u00e9 debe incluir)<\/h3>\n<ul style=\"color: #4c1d95; margin: 0 0 0 18px;\">\n<li>Nivel (Tier) del panel realizado y <strong>metodolog\u00eda<\/strong> (panel dirigido vs secuenciaci\u00f3n completa)<\/li>\n<li>Lista de <strong>genes analizados<\/strong> y alcance<\/li>\n<li>Reportar solo <strong>variantes patog\u00e9nicas\/probablemente patog\u00e9nicas<\/strong><\/li>\n<li>Evitar \u201c<strong>riesgo residual<\/strong>\u201d num\u00e9rico exacto (no es pr\u00e1ctico en paneles amplios)<\/li>\n<li>Reportar <strong>VUS<\/strong> solo en contexto de pareja y con consentimiento<\/li>\n<\/ul>\n<\/div>\n<p><!-- CTA final --><\/p>\n<div style=\"background: #2c5282; color: white; padding: 20px; border-radius: 10px; text-align: center; margin-top: 30px;\">\n<p style=\"margin: 0; font-size: 16px;\">Para asesoramiento gen\u00e9tico y reproductivo especializado:<\/p>\n<p style=\"margin: 10px 0 0 0; font-size: 18px;\"><a style=\"color: #93c5fd; text-decoration: none; font-weight: bold;\" href=\"https:\/\/androfertilidad.com\/en\/\">androfertilidad.com<\/a><\/p>\n<p style=\"margin: 8px 0 0 0; font-size: 12px; color: #cfe3ff;\">Basado en ACMG 2021 \u00b7 <a style=\"color: #cfe3ff; text-decoration: underline;\" href=\"https:\/\/www.nature.com\/articles\/s41436-021-01203-z\" target=\"_blank\" rel=\"noopener\">Art\u00edculo en Nature<\/a><\/p>\n<\/div>\n<p><!-- Nota de fuente --><\/p>\n<div style=\"margin-top: 20px; padding-top: 15px; border-top: 2px solid #e5e7eb;\">\n<p style=\"font-size: 12px; color: #6b7280; font-style: italic; margin: 0;\">Fuente primaria: Gregg AR, et&nbsp;al. (2021). Screening for autosomal recessive and X-linked conditions during pregnancy and preconception. <em>Genetics in Medicine<\/em>, 23(10), 1793\u20131806. DOI: 10.1038\/s41436-021-01203-z<\/p>\n<\/div>\n<\/div>\n<p>\u00ab`<\/p>\n<div style=\"max-width: 900px; margin: 0 auto; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6;\">\n<p><!-- Enlace interno al inicio --><\/p>\n<div style=\"text-align: center; margin: 12px 0 18px 0;\"><a style=\"color: #2c5282; text-decoration: none; font-weight: bold;\" href=\"https:\/\/androfertilidad.com\/en\/\">\u2934\ufe0f Ir al inicio \u00b7 androfertilidad.com<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\ud83e\uddec Cribado Gen\u00e9tico Preconcepcional (ACMG 2021) \u00b7 Fuente: Gregg AR, et&nbsp;al., Genetics in Medicine (DOI: 10.1038\/s41436-021-01203-z) \ud83d\udcd6 Tiempo de lectura: 5 minutos Recomendaciones oficiales del American College of Medical Genetics and Genomics (ACMG) \u2b07\ufe0f Ver\/Descargar art\u00edculo (Nature) \ud83d\udcda \u00bfQu\u00e9 es el \u201ccribado\u201d gen\u00e9tico de portadores? Cribado gen\u00e9tico es la evaluaci\u00f3n, preferiblemente antes del embarazo, para&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"default","_kad_post_title":"default","_kad_post_layout":"default","_kad_post_sidebar_id":"","_kad_post_content_style":"default","_kad_post_vertical_padding":"default","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1,3],"tags":[],"class_list":["post-2063","post","type-post","status-publish","format-standard","hentry","category-andrologia","category-blog-fertilidad"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.7 (Yoast SEO v22.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cribado Gen\u00e9tico Preconcepcional &#8211; 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