If you let your cat sleep with you on the bed does it hurt your fertility?!?

Me
MIL came over last night and she asked me if I let my kitty sleep with us in our bed at night. My kitty sleeps on top of my pillow above my head (she is tiny about 5lbs). She told me that letting the cat sleep with us can hurt my fertility if I ever want to get pregnant. Anyone ever heard of this? It's not the first time I hear this, but is it true or just superstition?? What are your thoughts on this?

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