“Fetus papyraceous occurs in 1 out of 12,000 pregnancies and 1 out of 200 twin pregnancies.”

Instead of absorption, it could have been papyrification, but apparently that leaves a kind of unmistakable trace for a doctor, which you mentioned so I assume was involved during birth. If pregnancy was non-standard in more ways then just finding out late, maybe those remains were so small that they were harder to notice?

I couldn’t find a written record of a similar situation where a second twin that was seen at 7 months and just vanished afterward, so this could be a unique mix of circumstances. That also makes it statistically a lot more likely that somewhere along the lines, information was missing, or got garbled in chaos, or was misheard, not unlikely during extreme situations like birth. I’m not even thinking about bad intentions, just all the places where one human error could be the missing puzzle piece.

Can you think of any extra information regarding your time during pregnancy and your birth you are willing to share?

It sucks that you couldn’t live with your twin, although I can imagine you have made you peace with it since. Having siblings can be a lot of fun, I know I love it :)