Representing pregnancy on LEGO minifigs without a dome So far for pregnancy I have tried a fetal carrier that I put on the minifig's back but this limits her movements. Specifically she can't bend too far in either direction and also she can't lay down the way she normally would (she would have to like bend her legs when she lays down or something to keep the fetus inside).

My minifigs don't have a hole in the belly where I can put a big white dome to illustrate pregnancy.

So what is the best way to show pregnancy without a pregnancy dome?
The best piece to represent a round belly is the "Plate, Round 2 x 2 with Rounded Bottom" (part 2654). The "dome" pieces are way too big. Connect the rounded bottom plate to the bottoms of two "Brick, Modified 1 x 1 with Headlight" bricks (part 4070), also known as the Erling brick. Use short legs to get the total height right.

Note that the pegs on the leg pieces are slightly larger than a normal stud, so they make for a very tight fit in the back of the Erling brick. They do fit with some force, and they are difficult to remove.

FYI, I experimented with a few iterations, including one using a 2x2 flat tile on a bracket, and this was the version that had my non-Lego fan wife exclaim, "Oh yeah, that looks good!"