I'm about 38 weeks with DC4 and have been getting painful but not totally regular contractions since the wee small hours of this morning (waking me up and keeping me awake). I'm fairly sure this is early labour, but no idea how long it could go on for... With DS2 I had regular-ish contractions (10-15 mins apart) for about 12 hours before labour proper kicked in; and with DS3 it was pretty much two full days. Fortunately once he got going it went pretty quickly (two hours from 4cm to birth).
I know no one can tell me definitively how long this latent stage will take, but I'm just wondering how long it lasted for others - especially those with four DCs. Thanks 