No they don't get fatter they just get a little baby bump.
When in create a sim, move the weight slider all the way to the right, until it is as big as they can get.
They get a lot fatter.
When they look fatter then usual?Your hamster starts making a nest. They also get fatter.
Fatter than a non pregnant tetra.
Your Sim can get pregnant throughout the time that it is an adult. However it cannot get pregnant the last three or so days of its adulthood. A male elder Sim can sometimes get an adult female Sim pregnant, but it is a much smaller chance of the Sim getting pregnant. Hope this helps!
if it looks fatter
no ur sim cant get pregnant, hope this help's :)
yes
You actually can not get a Sim pregnant in Sims 2 Pets.
Yes Vampire Sims can become pregnant in the sims 3. In fact vampirism is genetic in sims 3. eg: Sim+Vampire= Sim/Sim/Vampire/Vampire Sim+Sim=Sim Vampire+Vampire=Vampire
Your bird will get fatter and take ginormous poops!
You can get your sim pregnant in Sims 2 Apartment Life and Sims 2 Double Deluxe.