How long before labor does effacement start? It's really important to me that my mom be in the room during labor (for practical reasons - she knows my bizarre medical history better than any OB will, and she will stand up for me so I don't end up unable to care for myself again.) She was planning on coming out when I start effacing, but I can't find anywhere how long before labor it starts.
DS born 12/2012
Little Squeaker due 6/2015