Before changing a redirect to something different (e.g Fertility which was previously plant fertility), you gotta go through the "What links here" and retarget the existing inline links to it to the old target, otherwise you break all of those existing links. Its also a lot easier to do that first, before links for the new target are added (especially to templates) because then you know everything thats listed has to be changed, and you don't have to check each one.
I'm going through and fixing the ones for fertility now, but just for future reference. Otherwise, you've been doing great stuff, so please don't take this note as an admonishment.