Is it possible to tighten loose skin naturally without surgery?

I am a FTM but have always been a bit heavy I am 23 I don't know if that will help me after I give birth to tighten my skin around my belly or gain some elasticity but has anyone ever got there tight skin back? I always wanted to have a tight belly but I feel like that will never happen after this pregnancy any tips? Has anyone achieved getting a tight belly after giving birth with loose skin naturally?