[trollbridge]

Blood is drawn from basically every infant born in the US and then genetically tested for various diseases. And the health departments retain these cards with the blood draws, although I’m not sure how usable they are decades later.

If you have a baby at home with a lay midwife, the health departments retain will hound you endlessly to get this done, although legally you can choose to decline as a parent. Barely anyone does, since most parents want to know if their newborn will have a serious genetic disorder that can be easily avoided by (for example) avoiding artificial sweeteners.