That’s a really great question! I’m also not planning nor hoping to have children anytime soon (nor at all!) so I used to have the same conundrum when “fertility” popped as a spell result or correspondence for an item.
I think @Ostara gave a great answer- I agree! Although many people first think of conceiving children when they hear the word “fertility”, the truth is that that is just part of the definition of the word.
Looking at the definition of “fertile” from the Merium-Webster Dictionary, we get:
1a : producing or bearing many crops in great quantities : PRODUCTIVE fertile fields of corn and oats
b : characterized by great resourcefulness of thought or imagination : INVENTIVE a fertile mind
c : PLENTIFUL
2a(1) : capable of sustaining abundant plant growth fertile soil
(2) : affording abundant possibilities for growth or developmentdamp bathrooms are fertile ground for fungi— Consumer Reports a fertile area for research
b : capable of growing or developing a fertile egg
c(1) : capable of producing fruit fertile trees
(2)of an anther : containing pollen
(3) : developing spores or spore-bearing organs
d : capable of breeding or reproducing
This is a partial list- please visit the source for more definitions.
Source: Merriam-Webster Dictionary: Definition of Fertile
Like Linda said, fertile may also refer to nutrient-rich soil or plants bearing fruit or even synonyms of fertile such as “productive”, “inventive”, and “plentiful”.
All in all, I think those of us who don’t want to use the “Fertility” component of spells for conceiving children don’t have anything to worry about There are plenty of ways to use fertility spells that bring productivity, creativity, and bounty in our lives!