I read that only 30% of women experience their waters breaking as a first sign of labour...
and this is what you see in the movies! haha
With DD, my waters were the last thing to go, and they were "bulging" and wouldnt pop. MW didnt pop them as I opted for natural delivery, but this time (nearly 28wks) If they dont go earlier then I will ask them to be popped maybe? They didnt pop until DD's head was literally coming out.
I know everybody is different but what determines if your waters go sooner rather than later, or later rather than sooner?