My sims get pregnant with every woohoo too. No idea what is causing this.
Do you have MC WooHoo Risky WooHoo chance set?
I do. It's at 0%
I was mistaken, I meant the "Woohoo_TryForBabyPercent" setting, which is by default set at 80%. Nonetheless, you don't need to bother checking, the v3 release will handle that for you.