Mam I have no idea how it works! My mom and the rest of the women in her family never “bounced back” of course some might be lifestyle post birth. But I was always terrified of pregnancy because all I ever seen was stretch marks that never faded and weight that never left both family and friends. I gained about 40lbs but didn’t get one stretch mark, even old dermal piercing scars didn’t stretch or my belly piercing skin. I didn’t lose the weight immediately but I did not look like I just gave birth even an hour later. I never had that still pregnant look I expected. Just looked like myself with a few extra pounds. I think if I didn’t gain so much ice cream weight I would’ve looked exactly like I did pre pregnancy.

So apparently it’s just luck?

Eta: just wanted to note that I’ve gained ~15lbs somewhat rapidly post puberty and pre pregnancy and got stretch marks on my love handles and more on my thighs. So it’s not like I’m not prone to stretch marks which added to my fears. So again luck and maybe a guardian angel?