A recent study looking at the effectiveness of a male contraceptive injection was abandoned after the men taking part reported increased incidences of acne (nearly half), mood disorders (over a fifth) and raised libido (over a third). In fact, there were 320 men in the study – and a total of 1,491 adverse events were reported. For those overseeing the trial these side effects were viewed as being more significant than the fact that the contraceptive injection appeared to work well in reducing the production of sperm – and the evidence does appear to support their concerns?

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