2 dogs. 1 female 1 male. never pregnant
be responsible
Cats are so different to dogs, lol.
For starters, they go outside on their own.
And they'll come into contact with other cats, whether they're strays or cats belonging to other neighbours.
Furthermore, they'll have love with more than 1 partner. Chances are in any moggy litter you'll have 2-3 fathers contributing.
You also can't do much about a pregnant animal after they're pregnant, at least nothing that's legal.
Abortions for pets aren't overly common, and they're expensive (as all animal treatments are).
Best tip to Decepticon (and anyone else) is to just get your cats Spayed and Neutered as soon as possible.
It's easier and safer, and more humane, than letting them breed beyond your/their ability to care for their kittens.