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产前诊断有别于一般的产前检查。产前诊断的目的是在出生前预测胎儿是否有遗传性疾病或先天性畸形。如果能及时发现,将采用特殊手段,不让这类患儿出生,从而达到忧生的目的。目前,产前诊断的方法大致可分为三大类: 一、用特殊的仪器检查胎儿外形如B型超声波扫描; 二、检查母体的组织和体液,间接反映胎儿的疾病; 三、直接采取胎儿的组织或通过羊水进行检查。然而,以上只不过是就目前正在开展的技术而言,随着新的诊断方法不断出现,所能诊断的疾病种类也随之增多。虽然每一位准妈妈都希望更加全面地了解自己腹内胎儿的情况,但现在只对出现以下几种情况时,怀疑胎儿有先天发育异常者进行产前诊断:
Prenatal diagnosis is different from the general prenatal examination. The purpose of prenatal diagnosis is to predict whether the fetus has a genetic disease or a congenital malformation before birth. If we can find out in time, we will adopt special measures to prevent such children from being born, so as to achieve the purpose of worrying. At present, prenatal diagnosis methods can be broadly divided into three categories: First, with a special instrument to check the shape of the fetus, such as B-mode ultrasound scan; Second, check the maternal tissue and body fluids, indirectly reflect the fetus’s disease; Third, direct fetus Of the organization or through amniotic fluid to check. However, the above is only the type of diseases that can be diagnosed as new diagnostic methods continue to emerge for the technologies currently under way. Although every expectant mothers want a more complete understanding of their intrauterine fetal situation, but now only in the following cases, suspected fetal fetal congenital dysplasia for prenatal diagnosis: