No way, not a chance in hell. That's strictly personal, though. Ain't nobody wants to see me naked, not even me!!
That said, if you want them done, do them! I do like the looks of nude pregnancy photography. I just don't have the body for it.
I would say not until the third trimester, maybe half way through the third tri? Something like 33 or 34 weeks. Not cutting it too close and risking missing it for early delivery, but also having a sizable bump by then.
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