I'm just curious as I know everyone is different. I introduced my DH after about 2 months of dating (seeing each other 3-4 times per week). It wasn't a planned thing and I would have waited probably another month but all of us were going to the same concert so it just made sense to introduce him.
Also if you have kids how long did you wait before introducing your SO to your kids? I'm curious to see if/how the answers are different.