Yes you can. It does not matter whether your Sim is in a town or at university - they can still marry a Sim of the opposite gender.
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All sims in sims 3 can become cheerleaders in the university life. Sims 3 is just like real life, cheerleaders are not made but discovered within certain people.
You cannot have PlantSims in The Sims 3, unless you have University Life installed as well in your computer.
You can "find the cheat codes" for The Sims 3: University Life at IGN.com.Source(s): My Because It's Not Google (BING) Resources
Lots are out. The sims 3 university, sims 3 nightlife, sims 3 adventures, sims 3 generations... you name it!
If you are talking about being pregnant while in the university, then the answer would be a no. However, if you are talking about being pregnant at your hometown (Sunset Valley, Twinbrook etc), then your sims can get pregnant.