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2020: A systematic review confirmed ALCAR + L-carnitine significantly improved total sperm motility, progressive motility, and morphology at doses of at least 3 g/day, but did not affect sperm concentration or clinical pregnancy rates [5][48]
Even when clinical trials do not lead to effective new treatments, they often answer important questions and help move research forward
One drug in trials would require only monthly injections, and many candidate drugs are oral
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