Best is as soon as you know youre pregnant, else around 1st trim. Best to start early. I use bio oil & palmer’s lotion alternate. Yesss please put on your butt and thigh area. My mistake i thought stretch mark will only be on tummy so i only put there but then i started getting them at butt
I abit kiasu! I started since 1st trimester. Yes! Must put on butt and thigh as well because the skin there may stretch too! Sometimes even on upper arms (below armpits) depending on how much weight you put on.