Birth weight correlation with baby gender?

[Miss.September]

While I don't have different genders, I was more inclined to eat more junky foods with DD2 and she was 9lb 2oz at 40 +6 (I gained 11kg). DD1, I was pretty strict on being as healthy as I could be - so lots of veggie soups for lunch, very little junk food (as in chocolate, potato chips, cake) and she was 7lb 13 oz at 39+5 (I gained 9kg).

My friend had a big boy as her first, almost 10lb and her second was a petite little girl (same gestation) at just over 6lb.

Way back when my grandmother was having her babies, she'd had two big boys and her third was on the way. She was put on strict doctor's orders to consume no salt so she could have a little baby! I don't know what size my aunt was though. My grandmother always said how difficult it was to stick o any sort of salt-free diet.

I don't know if what I was eating contributed or not, just thought I'd give you more to ponder!

ETA - The comments about pushing and being coached ring true to me. DD1 was smaller in both weight and length, I needed a forceps delivery (plus epi) and I ad superficial tears. I had no idea what I was doing. Second time round, I went with what the midwife said, she coached me through and I didn't need forceps and no tears at all. (I did need an epi though but that was because the cord was around her neck an they had to cut it before she was born - they couldn't get to it without the epi.)