Researchers in China have used mass spectrometry to study how molecular mechanisms of certain hormones affect sperm production, potentially opening the door to new forms of male contraceptives.
 
To date the only forms of male contraception are condoms and vasectomies, which are often irreversible. Pharmaceutical firms have been working on developing alternatives, most of them hormone-based, and though some have shown some promise, to date none have made it to market.
 

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The US Food and Drug Administration has new guidelines that enable some gene and cell therapies to undergo expedited review, according to the New York Times.

Using gene drives to control invasive species might be too risky, an initial advocate of the approach says.

Researchers have grown tumors in 3D cell cultures to better understand cancer, the Economist reports.

In Science this week: intellectual property experts argue patent battles such as the one over CRISPR are wasteful, and more.