I had to look and see what issue of the Kenyon Review this one was published in at their website (Spring 2002) as I cannot locate my copy, but still remember the story like I read it yesterday (and no, if I'd read it yesterday I still wouldn't remember any specific lines!).
"Secession XX," by Kellie Wells, is the story of two twins, still in embryo, one male, one female, told over the course of the pregnancy, from both of their points of view. The format is two columns, so the ideal format would really be a wall, and not journal or book, as the 10 or 12 pages the story was in length would just stack from top to bottom and you'd be able to read from top to bottom. Actually, though, the more I think about it, pages might just be better as you don't really ever want to get too far ahead in one column over the other as the placement on the ol' height meter is the way to gage time in the story. So, having that page bottom to remind you, no matter how engrossed you might be in one twin embryo's point of view, that there is another to read, might just be a good thing.
Wells has always been a fan of biology, or maybe more accurately, the human body and all that is both inside and outside the body, when it comes to her work, and "Secession XX" gives her even more potential than normal to include terms and ideas.
She also slides something into the story, the fact that early on in the story, the female embryo twin is the dominant of the two, and the reader should note a subtle change to their points of view a little after the halfway point that continues to move forward to the point where the male embryo twin is doing all of the talking for the two at the end.
And while I don't remember exactly what it was for, I do recall the Periodic Table of Elements showing up in the male's column. And that it fit perfectly (reasoning, not sizing).
If you see Kellie's name in a Table of Contents, just take it to the counter.