Is it possible to have multi- gender twins in Sims 3? I want my sim couple to have twins, one boy and one girl , and I was wondering if there was a special way to do this. For example, do you eat three apples and three watermelons with the fertility treatment? Please let me know. Thank you!

I do believe that the gender of twins is always random, even when eating apples and watermelons it only increases the chances slightly. I don't know if having separate gender twins is possible, though.

I don't think you can get multi-gender twins/triplets. If you can then I've never seen it.

You have to have a world-renown surgeon tell your sim the baby's gender. Then eat apples if its a girl, and watermelon if its a boy.

Okay, thank you!
I believe I saw the multi- gender twins once on a picture thread. I may have to check again.

To it easier I saved a surgeon to the library so when someone is pregnant I move the surgeon into the household just to determine the gender and then delete them or kick them out.

I don't think it has to be top level in the medicine career. I'm sure I read somewhere that they only have to be level 5 or above in the medicine career path. I only bothered to do it once myself and I'm pretty sure they weren't top level.

You're welcome.



Really? I thought I only had to option at lvl 10.

That's what I thought too but last time I tried with a level 5 the option wasn't there.

Well, like I said, I'm pretty sure but can't say I'm definitely 100% positive 'cause I have a sucky memory so there's always the chance I could be remembering it wrong



Huh....weird. Well, I only did it once and it was months ago....could it have changed with a patch?

I had a sim who was a gene therapist (7 I believe) and she had the option, so I'm positive that you don't have to be a World-Renowned surgeon.

I've had someone do it at about level 7 as well, and it's 5 apples or watermelons you need to eat to be certain, not 3.

I'm guessing by the three disagrees to this that you can get multi-gendered twins then?

Yes, Its possible. I get multi-gendered twins and triplets about once or twice a generation.

That's so cool, thanks.

Multi-gendered twins cannot normally occur unless you perform very specific steps, because of how the system works: When a sim is pollinated, "destiny", in the form of the RNG seed, is preset. For EACH birth in that pollination, the SAME seed is used, with the result that the same random number is rolled for each birth to determine gender. Thus, they are always the same. The ONLY way to alter this value is to "modify" the numbers using the watermelon/apple thing, forcing a modifier to be tacked onto the roll and altering the result. Using the medical career advice does NOT alter the value, it only "peeks" and then "locks" the value. When you use the medical career interaction, you only peek at the number that WOULD be rolled: You do not alter it. Therefore, what is seen will be the same for BOTH...unless you then use watermelon/apple to alter the second one. Otherwise, you are altering blindly, essentially guessing that your watermelon/apple input would have changed the outcome.

Basically, destiny is set from pollination and can only be altered through watermelon/apple. If you alter it in the direction it was going to go anyway, nothing happens. If you reveal it using Medical, it is fixed for the first birth.

One of my Sims couples had Triplets. They had 2 girls and a boy.

j.m. are you saying if you eat 5 watermelons and 5 apples then you get one boy and one girl if your aim is a twin or triplet birth that has one of each sex (or two if it's triplets). sorry i'm new to the sim world so making sure i understand you correctly. thanks in advance for responding.

No, I'm saying if you eat 5 watermelons OR 5 apples, exclusively, not both, you will get one of each *IF* the gender you selected for wasn't what it was going to be anyway. Destiny is set from the pollination: So if it was already going to be a boy, and you eat apples, nothing happens. It is only if you alter the results by doing the opposite that you will get one of each.

I've never encountered a boy-girl pair of twins in TS3. Come to think of it, I've never even encountered a fraternal, same-sex one. I've only ever seen twin Sims with exactly the same genes.

That's because of the weird randomization that Pescado was talking about. If you want different twins, you need to have the baby determined before birth, and then eat enough of the fruit for the opposite gender. Otherwise a single random number affects all babies in the pregnancy. This would be why all the twins you have seen without having altered the pregnancy are identical.

That's definitely not the case with my game: I've yet to find a pair of completely identical twins - I've got one set that are very nearly the same, but their noses are ever so slightly different. The others have all been definitely fraternal twins, including a set of triplets with three different hair colours and at least two skin colours.

There are no truly "identical" twins either. The seed used for gender selection is not used for any aspect of genetic selection, so the odds that two sims inherit exactly the same set of blends given two parents is roughly equivalent to that of Total Existence Failure. However, there IS one behavior that WILL very likely render every sim in your neighborhood a genetic "clone", and that's "Generic Pudding Syndrome". Without AwesomeMod, every sim generated by the game is a "Generic Pudding", with absolutely no slider settings at all, the TS2 equivalent of an all face 1 neighborhood. Breeding with Generic Pudding will, of course, over time, force every sim to become a Generic Pudding as their slider settings randomly become Generic Pudding through inheritance, as the only sims you will be be able to marry unless you add your own will also be Generic Pudding.

I'm not fond of AwesomeMod, is there another mod that fixes the "Generic Pudding"?

There's no mod that automatically fixes generic pudding, but you can use Twallan's master controller to manually edit in CAS any generics that move in before they breed more generics.
You can use Twallan's story progression to stop most immigration, too, so you don't have as many generics moving in that you need to edit.