for me, it was pretty significant.
Mine was a 24days cycle, for 7 days longs.
After child birth.
I couldn't even count the days, cos' they are never accurate and instead of 7 days, it has became super heavy flow for 4 days...
My last child is celebrating his 4th birthday this year, and it was just about less than 6mths ago that my period (more or less) went back to what it was like before child birth.