Do they always make apple pancakes because apple starts with a and eating the things out of your fridge alphabetically somehow makes evil-random sense?
No they can make grape pancakes too. I just buy a bunch of the fruit of choice, put it in the pregnant Sims's inventory, and allow her to eat nothing else but that fruit from her inventory through her entire pregnancy. Except if I'm going for a boy, I will allow her apple pancakes - but that's about when she'll make GRAPE pancakes instead. I just do the watermelon or apples in the inventory method and it hasn't failed me yet.