LUCKILY NO to all of the above!
I have three little ones and have NO stretch marks.. I was woried I would get them.. But nope.. I had vagianl deliverys with all so no c-sections..
Now you want to talk about saggy boobs? I'm all over that.. I am only 29 and I feel like I have old woman boobs, unless I am engorged with milk, then they are pirky and hard. but when I am done nursing they sag..=(.. time for a boob job..