Female dogs in polyester pants? Yep, that actually happened—and what researchers discovered might just make you rethink your wardrobe.A 2008 study showed that polyester created an electrostatic field around hormone-sensitive areas in dogs, lowering progesterone and tanking fertility—even with artificial insemination. Meanwhile, cotton and wool? 100% pregnancy success rate.Now, I’m not saying your leggings are making you infertile… but if it affects other mammals, and we’re mammals… you do the ma