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先天性畸形的原因很多,遗传只是其中之一。其他如怀孕期(特别是早期)母亲生病,接触某些化学制剂,服用某些药物,受放射线、原子能损伤,中毒(也包括吸烟、喝酒)等.都可引起胎儿畸形。除此之外.还有不少引起畸形的原因目前尚不十分清楚。但各种畸形儿在总人口数中还是绝对少数,真正属于遗传引起的畸形也非常少见。另外,遗传引起的畸形是由父母双方的致畸因子
There are many reasons for congenital malformations, heredity is just one of them. Others such as pregnancy (especially early) sick mother, exposure to certain chemicals, taking certain drugs, by radiation, atomic damage, poisoning (including smoking, drinking), etc. can cause fetal malformations. In addition, there are many causes of deformity is not yet very clear. However, all kinds of deformed children in the total population is still an absolute minority, the real belongs to the genetic caused by deformity is also very rare. In addition, the genetically caused deformity is caused by both parents’ teratogenic factors