Well i got around to testing this the other day and rerolled the ltw like 50-100 times in both my normal hood and in uni and it didn't seem to roll up the want for the uni careers. I've got all eps and their installed in the order they came out.
You can do it with simpe, just knock on the pregnant option. I've done it before and i got 2 townie style (they live in a house but i never play them) sims that look and act always pregnant but in reality aren't.
I don't suppose this also allows you to roll up the uni career wants does it? SUPPOSEDLY you could get them but after installing nightlife they no longer roll up.