At level one fertility, and having gotten the fish of fertility, I've just gotten my second set of twins.

I've also gotten twins at level 1 Fertility, and I think I didn't have the Fish of Fertility yet.

I've just got three sets of Twins in a row, lucky me.
I've got 2 games going and i got the twins from my second game which is behind on Tech levels than the first lol.

QueenMez

what is fish of fertility? how do you get that? And how do you run more then one game at a time?

The fish of fertility is a puzzle. It takes one other puzzle being completed before you can get it as well as certain tech levels.

To run more then one game, click on the menu button, then click on change player. Then you can add up to four more games.

Was one of the parents a master parent??

The first time I played the game I never had twins or triplets and, of course, I had all levels of all tech. When I started again, I guess all the times I should have had twins or triplets was saved up because I have now had 27 sets of twins and 9 sets of triplets. They have all been identical right down to what job they have. When they are little they are really cute and, as Arnie said, they do the same things all the time even when grown. They have not, however, died at the same time.

I've just started a new game. Two of the original founders appear to be twins. They are both 21, wear the same design of dress and both have red hair. The were also both (rather unoriginally) named Ulu. Their hairstyles are different, though; one has an Alice band and the other a ponytail. Also, one has no special likes or dislikes, whereas the other likes medicine and playing.

I've renamed one of them to Ulu Two. I've got them both on farming at the moment; Ulu seems to learn much quicker than Ulu Two, who keeps giving up and saying "No".