Patient's question:
Our relationship can also be explained as my great-grandfather (my grandfather's father) and my girlfriend's great-grandfather (her mother's father) being the same father!Our common ancestor is fifth-generation.
Great-grandfather - Grandfather - My mother - Me.
Common ancestor
Grandfather - Her mother - Her.
Doctor's answer:
Hello! You do not belong to consanguineous marriage. Because consanguinity refers to having a common ancestor within 3-4 generations. If they marry each other, it is called consanguineous mating. Couples who engage in consanguineous mating may inherit the same gene from their common ancestor and pass it on to their children. If this gene is inherited in an autosomal recessive manner, their children may develop the disease because they are homozygous for the mutation. Therefore, consanguineous mating increases the risk of certain autosomal recessive genetic diseases.Pre-marital examination items: Chromosome testing is to detect genetic diseases such as Klinefelter syndrome, Turner syndrome, and infertility at an early stage. So don't worry, and many places have very casual pre-marital examinations, even just a quick look.