Ungraded CIN biopsy result I am confused, advice please ladies x

Hello ladies, I got my biopsy results today and I was just a little bit unsure of the result. It says that I have ungraded CIN and I'm booked in for a lletz on the 27th march. So just wondered if anybody else had the "ungraded CIN" result and if so do they know the reason why it is ungraded and not a number? Any info is so much appreciated and if you've experienced this result yourself what happend to your lletz result? Thank you. Xx