4 ms·

Anecdotal, but I believe it's very common, nearly ubiquitous, among medical professionals and people who have interacted with preemies.

• lanna 10y ago
  Yes, it is, at least here in Canada. Source: father of a preemie, had never heard the term before.
  • khedoros 10y ago
    In the U.S., as well. I knew the term before my son was born, but honestly, I'm not sure where from.
• mac01021 10y ago
  At hospitals in northeastern USA too.