I also wanted to make the game more interesting, less predictable, and more flexible while being more historically accurate.
You can find more information on Inteeminator and download it from http://www.simbology.com/smf/index.php#c7. Make sure to read all of the info before you download it.
The main features of the mod include risky woo hoo's for unpredictable/ less frequent preganancies, miscarriages based on needs/aspirations/age, teen pregnancies, teen/adult relationships and marriages, teen/teen marriages, and a few other things.
I'm mostly interested in risky woo-hoo and miscarriages but I know I'll like having all the added teen interactions, too.