Both babies born 39wks, first time I got none and second baby I got a few very small light ones in the last few weeks, but didnt really notice them til after the birth. I think its cause I carried very low, so lots of extra weight down there and I couldnt see that area till after the birth.
With both pregnancies I used apricot kernal oil everyday, up till the last few weeks where I got lazy - dont know if conincidence but thats when the marks turned up.