Older People Seeking Care for Cannabis Use at Greater Risk for Dementia, Study Finds

Users needing emergency care or hospitalization were more likely to later develop dementia, researchers reported. That does not prove cannabis was the cause.

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Pig Kidney Removed From Alabama Woman After Organ Rejection

Towana Looney lived with the kidney longer than any other transplant patient had tolerated an organ from a genetically modified animal.

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One-Third of Maternal Deaths Occur Long After Delivery, Study Finds

Pregnancy-related mortality has risen sharply, and doctors have overlooked a particularly dangerous period: from six weeks to one year after the birth.

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Citing Trump’s Order, V.A. Halts Most Transgender Care

Veterans who wish to change their gender “can do so on their own dime,” the V.A. secretary said.

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For Patients Needing Transplants, Hope Arrives on Tiny Hooves

Some scientists are confident that organs from genetically modified pigs will one day be routinely transplanted into humans. But substantial ethical questions remain.

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Surgeons Transplant Engineered Pig Kidney Into Fourth Patient

A 66-year-old man from New Hampshire became the fourth person to receive a pig’s kidney.

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Marijuana Dependence Linked to Higher Risk of Death

Two new Canadian studies are the largest to date looking at death rates and psychosis associated with cannabis use disorder.

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F.D.A. Approves Studies of Pig Organ Transplants for Kidney Patients

The research offers hope to tens of thousands of patients with kidney failure who are on a long waiting list for an organ transplant.

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N.I.H. Trials and Essential Hiring May Continue, Acting Director Says

The interim leader of the National Institutes of Health gave some clarification tied to Trump administrations restrictions on travel and communications, but questions remain.

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A Nutrition Program for Low-Income Americans Seeks Clarity on Funding Pause

It was not immediately known how the federal funding freeze would affect W.I.C., which provides vouchers for healthy foods to low-income pregnant and postpartum women, infants and children.

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