返祖畸形,是指出生的孩子出现人类远祖的某些特征,最多见的是多毛畸形和有尾畸形。众所周知,人类是经过了千百万年的进化,才一步一步由低级动物演化到古猿——类人猿——类猿人——人类的。人类的祖先具有全身多毛、有尾巴、胸部或腋下多乳头等特征。据研究资料,人类的胎儿在母亲体内孕育时,也或早或迟保留远祖的这些特征。比如,5个月的胎儿,全身胎毛浓密,只是手掌和足底没有毛。胎儿 Ancestor deformities, refers to the birth of children appeared some of the characteristics of human ancestors, the most common is the hairy deformity and tail deformity. It is well known that after millions of years of human evolution, human beings have evolved step by step from low-grade animals to the ancient apes - apes - apes - humans. Human ancestors have body hairy, tails, chest or armpit and other features more nipples. According to research data, when human fetuses are conceived in the mother’s body, these features of remote ancestors are also preserved, either earlier or later. For example, a 5-month-old fetus has thick whole body hair but no hair on the palms and soles. fetus