Talking with both mil and my mom today, and found out BOTH not only "didn't know" they were in labor with any of their children (seriously - my mom said she went to the doctor at the end of her pregnancy who informed her she was in labor - she truly had nearly painless early contractions and thought they were just more braxton hicks)
Once things actually were confirmed both birthed within four hours of confirming active labor with four children between them! (My own mother specifically seems to go from 1-10cm in a matter of hours). My maternal grandmother was the same with all three of her children (she had to "hold the last one in" and apparently the doctor was mad that she birthed so fast apparently...)
I will say it *kind of* made me nervous! (And excited at the same time). For mamas who've btdt... are you anything like your mother in terms of labor patterns?