The scarring usually lightens to a silvery colour instead of the red/purple marks but usually doesn't go away entirely unless you go for specialised treatment.
You can't get rid of stretch marks but it will lighten gradually after birth. May take months or probably a year.
https://sg.theasianparent.com/getting-rid-stretch-marks-pregnancy/?utm_source=question&utm_medium=recommended
I use bio oil many years back and my marks got lighten after using for almost a year
This is the best cream to get rid of stretch marks. Mine lighten and some gone already
Pamela