1st trimesterNo changes we required in my wardrobe.
2nd trimesterThe belly is growing but it's still quite easy to wear lolita fashion. I found myself opting out of skirts which are not fully shirred, though. Dresses are fine, they don't push on the belly.
Some of my daily outfits in 2nd trimester. Back-shirred BtSSB tartan JSK, back-shirred Bodyline JSK with floral pattern and a fully shirred Anna House skirt. The blouses are Anna House, shoes are Bodyline.
3rd trimesterTroubles are starting. The belly is big, skirts are unusable. Highwaist dresses are fine only for first half of 3rd trimester. Dresses from cutsew material and sack-cuts are wearable. Deflated petticoats are finally usable, fluffed to the side and to the back.
My high-waisted Angelic Pretty's Precocious Lady JSK and sack-cut Angelic Pretty's Dreamy Horoscope JSK outfits. I'm lucky it was summer and so I didn't need a lot of layers.