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LiveScience
LiveScience
Mindy Weisberger

Diagnostic dilemma: Woman had her twin brother's XY chromosomes — but only in her blood

Image of an X chromosome next to a Y chromosome on a blue background.

The patient: A 35-year-old woman in Brazil

The symptoms: The woman was referred to a hospital following a miscarriage at seven weeks of pregnancy. Leading up to the hospital visit, the woman's gynecologist had decided to check the patient's chromosomes to see if there was an underlying genetic reason for the pregnancy loss.

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