Was looking up something related to belly pics, and was surprised to learn that there's a specific term for nude belly pics: boudoir photos.  Did anyone else know that?

A boudoir (/ˈbuːdwɑːr/; French: [bu. dwaʁ]) is a woman's private sitting room or salon in a furnished accommodation, usually between the dining room and the bedroom, but can also refer to a woman's private bedroom.

there is no specific term for nude belly pics, especially this one. the term "boudoir photos" has long been used as a general term for "bedroom photos" for decades.

also:

https://www.huffpost.com/entry/where-did..._b_4654991

"It was in the 1920s when boudoir art and photography really began to come into its own. During this decade, it was generally illegal to have nudity in photographs, but regardless, photographers like Albert Arthur Allen, a French artist, continued to create masterpieces. He focused mostly on women, especially larger women, who posed in romantic ways against ornate backdrops.

Fast-forward to the 1940s, and suddenly the boudoir focus was on pin-up girls. These decadent women were delightfully curvy, as popular standards deemed a lack of shape typically undesirable. It was a culture quite different from our more modern, and ridiculous, ideas of beauty. These pin-up girls wore stockings, corsets, men’s ties and hats and were among the first to use various props in their unique “portraits.” "

nothing to specifically do with pregnancy. just a nice term for bedroom shots.