When did you start to show signs of progress?

My OB office starts them at 36 weeks, so I just had one today. (I've had them in the past due to all the BH contractions and spotting I've had throughout this pregnancy, so I'm not opposed to having them now). Anyway, OB said I was closed, long and thick. Baby is head down but not engaged. Curious when everyone started to see progress, or if nothing happened until you went into labor!