Baby’s weight at 35 weeks

What is your baby’s weight at 35 weeks? Went for my regular appt today and turns out baby is 3.1kg at 35 weeks and estimated to be 3.8-4kg at birth. Gynae was saying that this baby is large. I asked about whether I should take note of my diet etc but was told that there’s nothing much that I can do about it because it’s mostly genes. Just wondering is there really nth that I can do? I want to avoid c-sect as much as possible. I’m a FTM!