How many carrots did you eat exactly throughout the pregnancy?
I just got back from work. And have had all day to reconsider my hasty post of last night.
I'm embarrassed to confess that the pregnancy in question involved an alien, so I was wrong to say that the carrots/pop & strawb/alternative method wouldn't consistently work for sims.
All my result shows is that eating apples doesn't affect aliens. (I even made a copy of my file last night and redid it with exactly 10 carrots.)
Sorry for the misleading post!