It is possible for people with the same blood type to have children. People with the same blood type can get married and have children as long as they are not close relatives. This is absolute, so don’t worry that people with the same blood type can’t have children. First of all, to clarify a concept, close relatives may not marry, not because the blood type is the same, but because the two sides of the marriage of close relatives, have the same defective genes, the probability is greater than that of non-consanguineous relatives, so the probability of the offspring of the marriage with congenital genetic diseases is very high, and blood type is not related. Because the process of genetic sequencing of the child’s birth will select the one with small genetic defects for inheritance, the harm of inbreeding is very great. There are about four blood types in the world: A, B, O and AB, so there is no question of not being able to get married with the same blood type.