How common are twins?

Not that common but the easiest way would be to use the Rewards Store and buy a fertility potion.

It costs about 3k points and they are not that hard to obtain.

My sims always have twins and its actually getting annoying lol. It will be singleton, twins, twins, singleton.. this is where I miss toddlers because it's annoying having 6 kids at once lol

I LITERALLY just had twins three times in a row, same mother and father. Kind of ridiculous actually. -_- wanted a small family now i have six kids, two teens and four children. why is this so common? is it a glitch?

I think they're pretty common.. I've only just got the game and had only three pregnancies. each had twins.

I've heard that more people have been having twins/triplets since a recent update (I wouldn't know, I just got the Sims 4 a few days ago), but I had two sets of twins. I'd say they're pretty common as of late.

I’ve discovered that if you have a pregnant sim eat honey cake, they’ll have twins. Just happened across it, tried it a couple more times and twins every time.

Not sure, but my first birth was boy twins. I did have my mother sit in front of the tv and watch the kids channel to see if it would increase the chance. I think she sat there a few times, overall perhaps 3-5 sim hours. Not a lot and unsure if it that is why, but it could have helped. ;) She was BORED, though. LOL! I'd be interested to see what others have to say about this.

My Sim's second pregnancy was twins. It's the only set I've had thus far. Edit, I've had three Sims give birth:

Juliette - Single, twins, single, single, single
Toula - Single, Single
Nina Caliente - Single, Single

I've only had three pregnancies and no twins yet. I'll have to see how it goes for the next generation once they get to that stage of life.

I've been hearing that it's more common to have twins than before. My sim had twin boys.