1. Article 7 of China's Marriage Law clearly stipulates that marriage between close relatives is prohibited and considered illegal.
2. Marriage between close relatives is not in line with traditional ethical and moral values in China.
3. Both parties in consanguineous marriage are likely to inherit the same gene from a common ancestor. If this gene is inherited in an autosomal recessive manner, their children are likely to develop the disease due to being homozygous for mutations. Therefore, children born from consanguineous marriage have a higher probability of developing the disease, which does not comply with China's policy of eugenics and child rearing.
4. The early mortality and deformity rates of children born from consanguineous marriage are high.
