Most of my abortion-path anecdotes come from my PSF. Here one of the residents grosses most of them in as part of some project he is doing, and we are more than happy to let him.
1) Anencephalic baby, otherwise intact. Those are disturbing to look at. Saw quite a few and they never really get comfortable to look at.
2) When doing one POC that was about 12-15 weeks, somewhere around there, I put through the entire hand into a histology block, so that I could see what a developing hand looked like. The histotech freaked out when she saw it and I wasn't allowed to do that again. So I stuck later to doing things that weren't recognizable, such as the full cross section of the 8 week fetus anencephalic head, and the full larynx, etc.
3) The strangest are when you get the macerated contents, and you are able to recognize a few parts here and there - usually a leg or an arm, sometimes the heart. But it's odd when you can't find a large portion of it.
4) There was a stillborn birth at about 12 weeks or so and it was sent to the morgue for some reason, and never claimed. A couple of months later the family decided they wanted an autopsy. So I had to do an autopsy on a mummified 12 week fetus. They had bothered to put the little bonnet on its head, but otherwise it was shriveled and brown.
5) 16 week or so fetus, the POC is sent down as one specimen, and there is a second specimen labeled "heart." They wanted us to identify if there were any clear cardiac anomalies. It was about the size of a marble. I took it to the dissecting scope and found the PFO but that was about all I could tell.
6) about a 12 week fetus, sent down POC and wanted to know if it was an imperforate anus.
On a related note though, eyeballs are the specimen that freaks me out the most. Cutting into an eye makes me squeal. I remember doing it the first time in anatomy lab and I felt like I was sticking a knife into my own eye.