An older, hyper pregnant Ruby Pinch, taking a nap.

Babs Seed holding onto her belly due to the foals within kicking about.

Berry Punch kissing Ruby Pinch on her head with the little filly sleeping next to her as Berry's sister, Pina Colada, listens in to her older sibling's foal filled belly.

Lyra kissing Tootsie Flute on her cheek with the unicorn filly lying on top of Lyra's belly.

Well, I'd like to suggest something as well:

Have you thought about drawing an hyperpregnant anthro/EQG as a catgirl, with fake cat ears, fake cat tail and mostly black/leather clothes? Either Rarity, Sunset or Twilight would be good, but you can choose your fave girl if you want to.

Danke for opening suggestions tho.

Wish I'd seen this thread about a second ago. Kick edit for that Rarity WIP would be right up my alley.

My only suggestion is pregnant Trixie or Starlight Glimmer, facing towards the camera.

One for a underused pone in preg: Some (sorta reasonably) pregnant Sassy Saddles showing off a new maternity design in the Canterlot store? Approving marshmallow horse optional.

^Liking the thought of further background-pone fertilization. Countess Coloratura & Sapphire Shores belting out a bump-to-bump duet, perhaps?

Perhaps a rather large bellied Celestia?

Given Limey's cuddly protuberance in recent pics, perhaps rounding out the rest of the Pie clan might be fun.