Patient's question:
My grandfather and his grandmother were siblings. So, what generation are we? What risks would we face if we have children?Doctor's answer:
You are fourth-degree collateral relatives. There may be potential impacts, so it's best to get a check-up at the hospital. Direct relatives refer to family members with a direct lineage relationship. Ancestors such as parents, grandparents (grandparents on the mother's side), and others counted upwards from oneself are considered senior direct relatives. Descendants such as children, grandchildren, and great-grandchildren counted downwards from oneself are considered junior direct relatives, who share the same bloodline with oneself. Meanwhile, siblings, uncles, aunts, nieces, nephews, and other same-generation, senior, and junior relatives are all collateral relatives.