I would imagine sperm banks do something similar. They have standards for who they accept, they won't take donations from just anyone. And I really doubt they just roll dice and give you a random man's sperm.
Sleeping with some person doesn't tell you anything about, say, their family medical history. Sperm banks check that stuff.
Sleeping with some person doesn't tell you anything about, say, their family medical history. Sperm banks check that stuff.