1. 畸形：有一类疾病在胚胎中就已发生,母体或者胎儿的原因都可能造成胎儿在母体内死亡(fetus demise)、变异(mutation),或者畸形(abnormality),后两者可能同 时发生,胎儿也能被安然生下来(live birth).

2.

2. 异常,紊乱,不正常现象：abnormal 异常的,反常的,不规则的 | abnormality 异常,紊乱,不正常现象 | aboard 在(某种运输或运载工具)上

1. （尤指身体或行为上让人担忧或危险的）反常情况，变态特征
    An abnormality in something, especially in a person''s body or behaviour, is an unusual part or feature of it that may be worrying or dangerous.

    e.g. Further scans are required to confirm the diagnosis of an abnormality...
           需要进一步扫描来确诊是否出现异常病变。
    e.g. Genetic abnormalities are more often associated with faults in paternal DNA than in maternal DNA.
           相对于母本DNA,基因畸变往往更多地与父本DNA上的缺陷相关。

1. behavior that breaches the rule or etiquette or custom or morality

    Synonym: irregularity

2. marked strangeness as a consequence of being abnormal

    Synonym: freakishness

3. retardation sufficient to fall outside the normal range of intelligence

    Synonym: mental defectiveness

4. an abnormal physical condition resulting from defective genes or developmental deficiencies

    Synonym: abnormalcy