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Supreme Court Strikes Down Abortion Restrictions in Texas

The Supreme Court has overturned a Texas law requiring clinics that provide abortions to have surgical facilities and doctors to have admitting privileges at a nearby hospital. The law was predicted to close many clinics and further reduce availability of abortion in Texas; the court has ruled the law violated the Constitution.

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Why Do We Inherit Mitochondrial DNA Only From Our Mothers?

Our mitochondrial DNA accounts for a small portion of our total DNA. It contains just 37 of the 20,000 to 25,000 protein-coding genes in our body. But it is notably distinct from DNA in the nucleus. Unlike nuclear DNA, which comes from both parents, mitochondrial DNA comes only from the mother. Nobody fully understands why or how fathers’ mitochondrial DNA gets wiped from cells. An international team of scientists recently studied mitochondria in the sperm of a roundworm called C. elegans to find answers.

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Bioethics in China: No Wild East

The first and only published papers to describe genome modification in human embryos have come from Chinese laboratories. For some, this is another signal of China’s successful transformation from a closed society focused on farming and the manufacturing of commodities to a world leader in innovation. For others, these studies are the latest in a list of feats reported over the past decade that reflect the country’s lax regulation or cultural indifference to fundamental ethical tensions.

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Fertility Treatment Not Tied to Twin Birth Defects

Twins born after fertility treatments may be susceptible to different — and fewer — birth defects than other twins, new research suggests. The study confirms that twins have a higher risk of birth defects than singletons, but it questions the notion that fertility treatments contribute to those abnormalities.