My wife ate at least one avocado and one kiwi per day while she was pregnant. My son then started eating them as soon as he could eat solid food. He still eat kiwis rather frequently, but he has had at least one avocado per day for the past five years since he started eating solids.
We rarely kept avocados in the house before my wife became pregnant and now we can never be without them.
I don't know if he'll be a genius but he's definitely ahead of the curb development wise according to our neighbor that is a child psychologist. And my boy has also maintain at least 99.7th percentile in both height and weight. I'm pretty sure most of that is genetics but I make sure he gets plenty of fats and protein. He was 100th percentile in both for the longest time but I guess he's starting to fall behind a bit.
We rarely kept avocados in the house before my wife became pregnant and now we can never be without them.