I miss having foals around, but I don't miss sleepless nights at all.
I guess I was lucky with my foals. Moms had all signs right out of the book. First one was a surprise, tho. Momma didn't wait until dark. She pushed the colt out 20 minutes before lunch feeding....so she could eat it all, I guess.
The others all came within 3 hours of showing discomfort.