1, the marriage of close relatives violates the relevant provisions of China's marriage law, the Civil Affairs Bureau is not to apply for a marriage certificate. Even if you do get married, it's not valid if you're found out. 2, consanguineous marriage will greatly increase the incidence of recessive genetic diseases. 3, the incidence of multiple genetic diseases is higher than that of non-consanguineous marriage. 4, the offspring of consiglient marriage are prone to problems such as deformity, disease, and poor physique. 5. Offspring are prone to stunted growth.
1. Marriage between close relatives is illegal
Consanguineous marriage is illegal, and the registry office won't give it
For marriage registration
2, improve the incidence of recessive genetic diseases
Because consanguineous marriages are related marriages within three generations, the probability that the couple will have similar genes in their bodies is much greater than the probability that two unrelated people will have similar genes. In this case, the incidence of recessive genetic diseases in the offspring born is tens or even tens of times higher than that of normal children. Therefore, in the case of marriage between close relatives, the occurrence of recessive genetic diseases in the offspring will be an important factor affecting the health of children.
3. Increase the incidence of polygenic genetic diseases
Not only is the incidence of recessive genetic diseases significantly higher than normal under conditions of consanguineous marriage, but also the incidence of polygenic genetic diseases. Polygenetic diseases include congenital heart disease, anencephaly, spinal cord fission, etc. The incidence of these diseases is 0.57% in normal children and 1.64% in children born of close relatives. From this, we can see that consanguineous marriage is extremely obvious for the induction of polygenic genetic diseases.
4. High mortality and deformity rate
In addition to some genetic diseases, the offspring of close relatives will also have deformities. These conditions together lead to higher mortality rates among these children.
5. Offspring are stunted
If the offspring of close relatives can survive and escape the erosion of various diseases, then he is not as strong as normal children in the growth and development process in the future. Generally speaking, children born to close relatives will have physical decline, weight loss, height reduction and other symptoms in the future development process, which are extremely unfavorable to the growth of children.