Same-sex heart transplants are better

A new study finds female heart transplant patients survive longer when the donor heart comes from another female.

Johns Hopkins University researchers studied more than 18,000 patients. They found recipients with matching genders had a 14 percent lower risk of rejection and a 20 percent lower risk of death compared to donor hearts coming from the other sex.

Scientists suspect size plays a role. But authors do not recommend rejecting a heart based on gender.

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