Researchers rushing to apply powerful sequencing techniques to ancient-human remains must think harder about safeguarding, urge Keolu Fox and John Hawks

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The US Department of Health and Human Services is vigorously contesting a report, published by The Washington Post, that it has decided to cancel a $2-million-a-year contract that funds work using human fetal tissue to develop mice with humanlike immune systems for testing drugs against HIV

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The failure of systems used to store frozen eggs and embryos at two fertility clinics has rattled people who count on such clinics to help them realize their hopes of having children. But the breakdowns at clinics in Cleveland and San Francisco, each apparently involving the temperature or level of liquid nitrogen in one storage tank, have damaged at least some eggs and embryos belonging to potentially hundreds of people

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Major investment in regenerative medicine enters its last stage — and the money might run out before treatments are ready

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The step by the developmental biologist Fredrik Lanner makes him the first researcher known to attempt to modify the genes of healthy human embryos. That has long been considered taboo because of safety and ethical concerns

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When Scott Gatz and his husband decided to become fathers several years ago, pursuing parenthood meant finding both an egg donor and a surrogate to help them conceive a baby. Their first round of in vitro fertilization produced seven healthy embryos. One of those embryos was successfully transferred to their surrogate’s womb, resulting in their son Matthew, who is now 6-years-old

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In the first decision in California to address a dispute over the fate of frozen embryos after a couple’s divorce, a state judge in San Francisco on Wednesday ordered the destruction of five embryos after a man challenged his ex-wife’s right to use them

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Kathy Niakan’s application to use a new gene-editing technique on embryos is controversial because we lack a clear moral framework for such science

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