Effaced and what?! UK post..?

Kim • From UK 🇬🇧 relationship since 2010 🎉🔑🌹👫 want a big family currently 👧👦🏼👶🤰👨‍👩‍👧‍👧
So I've seen a lot of ladies being examined and being told they are dilated and effaced....
Is this a US thing? Or am I being sorely neglected?! 
I'm awful confused!! 36w6d
Thanks!!