What is a mod for sims 3 teen pregnancy?

You need to download NRAAS Woohooer and tweak it a little.

1.click on active sim

2.click on NRAAS and then on Woohooer

3.click on try for a baby from the chart that you opened.

4.click on species: human

5.click on Autonomous Teen Try For Baby to make it true

here is the link:

http://nraas.wikispaces.com/Woohooer+Phase+Eleven

I tried it and it works perfectly.

P.S: you can also tweak some things under the romance to allow teen mariege.

if your corrent patch level is lower then 1.50, so go here and chose what you need:

http://nraas.wikispaces.com/Woohooer