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Health

Discover the latest health news, scientific discoveries and big ideas about the human body and treating diseases, covid-19, diet, fitness, exercise, wellness and how to live a healthy life.

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What lab-grown ‘mini-brains’ are revealing about this mysterious organ

Blobs of human brain cells cultivated in the lab, known as brain organoids or 鈥渕ini-brains鈥�, are transforming our understanding of neural development and disease. Now, researchers are working to make them more like the real thing

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Hormone Replacement Therapy; Shutterstock ID 181675340; purchase_order: -; job: -; client: -; other: -

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Hormone replacement therapy may be safe after breast cancer treatment

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Polarised light micrograph of serotonin crystals

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No link between depression and serotonin, finds major analysis

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A person takes samples from Marseille sewage water near a retirement home in France to detect covid-19 traces in December 2020

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Sewage surveillance spots new covid-19 variants as effectively as PCRs

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NEW YORK, NY - JUNE 08: Passengers wear masks at the subway during rush hour on June 08, 2021 in New York City. New York City's subways are now operating 24-7 as Covid-19 cases have dropped and more Americans receive the vaccination for Covid-19. (Photo by Robert Nickelsberg/Getty Images)

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How to cut your risk of catching the BA.4 and BA.5 covid subvariants

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Sign showing temperature of 43掳C.

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Why are heatwaves dangerous and how does extreme heat affect the body?

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Sperm cells

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What we know so far about how covid-19 affects sperm

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X and Y chromosome

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Risk of heart failure may increase with age due to Y chromosome loss

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Nader Moazami, MD, (right) surgical director of heart transplantation at the NYU Langone Transplant Institute, and cardiothoracic physician assistant Amanda Merrifield prepare to remove the heart from a recently deceased donor on Wednesday, July 6, 2022, in New York, NY.

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Modified pig hearts transplanted into dead people kept on life support

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Light micrograph of a section through the seminiferous tubules, the site of sperm production

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Tiny bubbles in semen could contribute to 鈥榰nexplained infertility鈥�

A small study in men suggests tiny bubbles of cell membrane found in semen are different in those with unexplained infertility issues compared to those with no fertility problems, which could help explain the mysterious condition

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Men may eat more in summer because sunlight makes them hungrier

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Infertility in some men may be caused by X chromosome mutations

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UK’s latest omicron wave being driven by BA.4 and BA.5 covid variants

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We really can become 鈥榟angry鈥�, suggests first real-world test of idea

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