{"id":15911,"date":"2013-04-09T05:48:25","date_gmt":"2013-04-09T08:48:25","guid":{"rendered":"https:\/\/babies.constancezahn.com\/?p=15911"},"modified":"2021-07-31T13:34:47","modified_gmt":"2021-07-31T16:34:47","slug":"teste-de-dna-fetal-no-sangue-materno","status":"publish","type":"post","link":"https:\/\/babies.constancezahn.com\/teste-de-dna-fetal-no-sangue-materno\/","title":{"rendered":"Teste de DNA fetal no sangue materno"},"content":{"rendered":"<p style=\"text-align: justify\">O <a href=\"http:\/\/www.embryofetus.com.br\/index.php\" target=\"_blank\" rel=\"noopener\"><em><strong>Dr. Sang Cha<\/strong><\/em><\/a>, <strong>especialista em reprodu\u00e7\u00e3o humana<\/strong>, fala de um <strong>novo teste<\/strong> que deve revolucionar o <strong>pr\u00e9-natal<\/strong>. Nele, j\u00e1 \u00e9 poss\u00edvel verificar <strong>malforma\u00e7\u00f5es fetais<\/strong> com apenas <strong>10 semanas de gesta\u00e7\u00e3o<\/strong>.<\/p>\n<p style=\"text-align: center\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-15918\" src=\"https:\/\/babies.constancezahn.com\/wp-content\/uploads\/sites\/2\/2013\/04\/teste-dna-fetal.jpg\" alt=\"teste-dna-fetal\" width=\"519\" height=\"389\" \/><\/p>\n<p style=\"text-align: justify\">Toda gr\u00e1vida, independente da sua idade, apresenta um pequeno risco do seu beb\u00ea ter <strong>malforma\u00e7\u00e3o<\/strong> e\/ou <strong>anomalias cromoss\u00f4micas<\/strong>. Por isso, logo ap\u00f3s o parto, \u00e9 comum ouvir a pergunta: <strong>o meu beb\u00ea \u00e9 perfeito<\/strong>?<\/p>\n<p style=\"text-align: justify\">As <strong>malforma\u00e7\u00f5es fetais<\/strong>, em sua maioria, independem da idade materna, sendo que a sua ocorr\u00eancia \u00e9 ao redor de 3%. Existem algumas condi\u00e7\u00f5es que aumentam a sua incid\u00eancia, como o consumo elevador de \u00e1lcool, uso de medicamentos teratog\u00eanicos, exposi\u00e7\u00e3o a radia\u00e7\u00f5es ionizantes, defici\u00eancia e \u00e1cido f\u00f3lico, entre outros fatores. O diagn\u00f3stico \u00e9 feito atrav\u00e9s de ultrassonografia morfol\u00f3gica de primeiro trimestre (12 a 14 semanas) e\/ou do segundo trimestre (20 a 24 semanas), que quando realizados por profissionais experientes, chega a identificar 95% das anomalias fetais estruturais.<\/p>\n<p style=\"text-align: justify\">Por outro lado, as <strong>anomalias cromoss\u00f4micas<\/strong> aumentam, na maioria das vezes, com a idade materna, principalmente as trissomias, que s\u00e3o caracterizadas por excesso de cromossommo, senso as mais frequentes a <strong>S\u00edndrome de Down<\/strong>, a <strong>S\u00edndrome de Edwards<\/strong> e a <strong>S\u00edndrome de Patau<\/strong>. J\u00e1 as monossomias, caracterizadas por falta de cromossomo, independe da idade materna, particularmente a <strong>monossomia do cromossomo x<\/strong> (S\u00edndrome de Turner).<\/p>\n<p style=\"text-align: justify\">Muito recentemente, surgiram <strong>testes<\/strong> que permitem <strong>diagnosticar fetos com altera\u00e7\u00f5es cromossomicas<\/strong>, especialmente a <strong>S\u00edndrome de Down<\/strong>, atrav\u00e9s de <strong>exame de sangue da gr\u00e1vida<\/strong>, em que o <strong>DNA de origem fetal<\/strong> \u00e9 extraido do <strong>sangue materno<\/strong> e analisado por t\u00e9cnicas que identificam <strong>sequ\u00eancias g\u00eanicas<\/strong> especificas dos cromossomos.<\/p>\n<p style=\"text-align: justify\">Isso representa um grande <strong>avan\u00e7o da ci\u00eancia e da obstetr\u00edcia<\/strong>, pois sabemos que a grande maioria das <strong>crian\u00e7as com S\u00edndrome de Down (sd)<\/strong> nasce de <strong>gestantes jovens<\/strong>, isto \u00e9, com menos de 35 anos, por representarem um universo de 85% das gr\u00e1vidas, apesar do risco relativo para sd ser menor. o exame, n\u00e3o sendo invasivo, poderia ser <strong>indicado para todas as gestantes<\/strong>, sem distin\u00e7\u00e3o de idade ou risco.<\/p>\n<p style=\"text-align: justify\">Obviamente, <strong>a decis\u00e3o de fazer ou n\u00e3o o teste \u00e9 da gestante, assim como o que fazer frente a resultado positivo do teste<\/strong>. Para maiores informa\u00e7\u00f5es, converse com o seu m\u00e9dico.<\/p>\n<p style=\"text-align: justify\"><em><strong>Dr. Sang Cha<\/strong><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>O Dr. Sang Cha, especialista em reprodu\u00e7\u00e3o humana, fala de um novo teste que deve revolucionar o pr\u00e9-natal. Nele, j\u00e1 \u00e9 poss\u00edvel verificar malforma\u00e7\u00f5es fetais com apenas 10 semanas de gesta\u00e7\u00e3o. Toda gr\u00e1vida, independente da sua idade, apresenta um pequeno [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15918,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[203859,203869],"tags":[676],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.5 (Yoast SEO v22.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Teste de DNA fetal no sangue materno - Constance Zahn | Babies &amp; Kids<\/title>\n<meta name=\"description\" content=\"O Dr. Sang Cha, especialista em reprodu\u00e7\u00e3o humana, fala de um novo teste que deve revolucionar o pr\u00e9-natal. 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