4th natural childbirth?

This is going to be my 5th pregnancy, I am due Dec 5th. I have had all my children so far drug free. Nothing at all, my 1st child , I was in labor 4 hours ,pushed twice and he was out and weighed 7lbs 5.5ozs, 2nd was 22 hrs of labor and pushed a long time and she weighed 6lbs 3 ozs, 3rd baby, I was in labor 17 hours and he weighed 9lbs 13oz, my 4th, I was in labor 8 hrs pushed not long and he weighed 8lbs 11ozs. I have all 4 vaginally, no c-sections yet. Hope this helps.