Eating make a difference??

I’m just curious here as to what u others think... does it make a difference on moms calorie intake as to what her baby weighs? I know some people have the mindset that if the Mom gets big well of course she’ll have a big baby but I wanna know cause there’s some girls at church that had babies all within a few months,1 was really petite 1 was your average size/thin, and the other was tall/bigger built and the bigger of them all had the smallest baby weight wise... 🤔 what’s your opinions? I’ve gained 50+ lbs already (I know😲😲) but i don’t necessarily feel like it and I havnt just gorged myself with food either! And I still have an inkling that I’ll have a smaller baby!