I've read that a lot of women don't lose it until mid labor or sometimes they just lose little pieces at a time. Everyone is different (:
I started losing little bits of mine around week 32 I believe. I'm 36 weeks now & just started losing bigger chunks, it depends on your body
it can happen any time really. it regenerates itself though so it doesn't really mean anything when you start losing it.
I'm almost 38 weeks and still no sign of mine