The Impossible discovery: Scientists baffled by woman's male blood discovery

What if your own blood belonged to someone else? In a story that sounds like science fiction, a woman in Brazil has discovered that every cell in her bloodstream carries male XY chromosomes. The woman had lost a twin during her birth. This medical breakthrough is baffling the world’s top geneticists. Is it the result of a "vanishing twin" from the womb, or a mutation we’ve never seen before?