A couple trying to conceive faced years of uncertainty until diagnostic testing uncovered an unusual culprit: a rare allergic reaction to semen. According to Live Science, this condition is so seldom identified that many fertility specialists might overlook it entirely. The allergy, it turns out, had been preventing the couple from achieving pregnancy. With a diagnosis in hand, they now have clarity and, potentially, options for managing the condition—a significant discovery after a long and frustrating search for answers.

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