Specifically, a scientist makes a deeply important discovery: locating the X-Gene. It turns from a notional thing thing that theoretically exists because we can observe that mutanthood is hereditary, and we know heredity happens through genes (although, in the real world in the 2010s, it looks like epigenetics plays a much larger part in development than we expected back then). Instead, we know where and what it is. And because you can see it, you can test for it. It then immediately raises the possibility on using this on foetuses. It doesn't mention the a-word exactly, but it does mention the rather less medically feasible but more palatable to its audience prospect of in-utero alteration to remove the X-Gene.
Unfortunately, having all that potential resonance, the actual story that it hangs off this just isn't very good. It's a straightforward runaround where X-Factor have to defend the objectionable but perfectly law-abiding scientist, Doctor Tucker, from the Mutant Liberation Front. They fail, which is unusual, and presents a little grey, but it's all too convenient an escape route. Rahne makes sure the computer is destroyed, in the fight, leading to the only satisfying character moment in the entire story, but even that is underexplored. While we're supposed to imagine this will set back the research significantly, I'm not buying that. Even if Tucker hasn't published, someone else will do soon. The 1990s is Gene Finding time, and people will be finding genes.