Assertion: melatonin's role | /r/HasProperty | protective
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text: A meta-analysis of 5 studies published prior to April 2013, lacked sufficient high quality data to determine effect or benefit of melatonin supplementation during controlled ovarian stimulation in women undergoing assisted reproductive technology.129 Studies in men suggest that melatonin may have a protective role on spermatozoa through free-radical scavenging activities.41