I got a few at around 40 weeks (I was induced at 41 weeks). I gained around 22 pounds.
I loooove the stretchmarks I have. I never liked showing my tummy before pregnancy but now, just three months after giving birth I love to! (Though I am sure nobody is impressed with them haha). When out with my hubby and baby it's like, "yeah, that's right! I carried that adorable baby and she gave me these!"