In 2 1/2 years, I've had three, personally. And several other nurses have had them as well. Usually it's a multip coming in the door complete and doc doesn't have time to run in. Sometimes, it's doc taking his dear sweet time getting there.
#1 I was still on orientation. Doc walked in, looked, said it will be another hour, and walked out. About 10 minutes later baby crowned up and came right out. Baby had a nuchal cord but would hang around for me to pull it over, so he just flipped over through it.
#2 34 weeker who went from 6 to complete and started pushing on her own. I was really just there to catch as the baby came out on his own.
#3 Term primip with plenty of time for doc to get there. I called doc at 6 cm said she's feeling really pushy. Called her again when she was complete, told me she'd be there in 15 minutes. Had Mom blow through contractions as long as she could, then told her if she couldn't not push, to just do little tiny pushes.
As I kept looking over my shoulder, expecting doc to walk in any minute, I realized baby was coming regardless. I delivered a 7 pounder with a nuchal hand over an intact perineum (for a doc that ALWAYS cuts an epis). I was pretty proud of that one. It was a beautifully, smooth birth. Doc got there 35 minutes after I called. With mug of coffee in hand, purse on her arm, and baby on the stabilette. Later found out, "I went downstairs, made some coffee...... I figured I had an hour."
Just because you read it in a textbook, doesn't make it so. :wink2:
Forgot to add my #4 precipitous delivery. That was my own.
We didn't make it to the hospital, and I delivered in my bathtub. Really I just caught him, he birthed himself with no pushing from me.