STRETCHMARKS

Hi mga mommies, ask ko lang po when do stretch marks usually show up? I have a preggy friends too and they said that theirs shows up at around 3mos or 4mos or depende kung pala kamot daw. Curious lang po coz I am currently 21wks 2days (5mos) and nagkakamot ako but hindi naman palagi lalo sa tummy part, most of the time sa breast area kase sobrang kati and I can see strikes of lines na sa part na yun when I was on my 4th month. How about po kaya sa tummy? #curiousmomtobe