getting births signed off--time limit?

[lotusma]

i could probably do some digging to find the answer, but thought i might start here w/ you informed ladies. :) i attended three years worth of births several years ago w/ a CPM before taking a break to have two more babies of my own, and i didn't get around to getting them signed off. (oops) i'm ready to pick up where i left off, but am wondering if there's a point where births are too "old" to be signed off and/or used towards numbers for NARM. TIA!

[mwherbs]

10 years, but you also have to have some current experience look at the NARM site I saw it there not long ago.