Right now, there isn't one, but the chances increase, if your pregnant sim watches the kids TV channel, listens to the children radio or gets the Fertility Treatment lifetime award for about 50 000 Lifetime Happiness points.
Yes
You can't.
You can't don't study these idiot's
No. It comes with ambitions on sims 3
In the cheat box type: forcetwins.
To get twins, you can use the cheat "forcetwins" in the cheat console after your sim is pregnant.
yes, to make it more likely to happen then if you go into your sims rewards you can get a fertility treatment
There's a cheat for it.
On the Sims 2 if you want your sim to have twins,just type in the cheat boxforcetwinsand when your sim gives birth she will have twins!!|Warning: I think this cheat only works on macs
Can only have twins but the cheat is forcetwins
No we cannot only one but you can do a cheat virsion too get 2
There is a lifetime wish where you can have better fertility, but without it, you just have to hope for the best.