Male Infertility — Administration of Antioxidants to Infertile Men and Sperm Quality
Citation(s)
Agarwal A, Virk G, Ong C, du Plessis SS Effect of oxidative stress on male reproduction. World J Mens Health. 2014 Apr;32(1):1-17. doi: 10.5534/wjmh.2014.32.1.1. Epub 2014 Apr 25.
Chen SJ, Allam JP, Duan YG, Haidl G Influence of reactive oxygen species on human sperm functions and fertilizing capacity including therapeutical approaches. Arch Gynecol Obstet. 2013 Jul;288(1):191-9. doi: 10.1007/s00404-013-2801-4. Epub 2013 Mar 30.
Majzoub A, Agarwal A Systematic review of antioxidant types and doses in male infertility: Benefits on semen parameters, advanced sperm function, assisted reproduction and live-birth rate. Arab J Urol. 2018 Jan 2;16(1):113-124. doi: 10.1016/j.aju.2017.11
Tremellen K Oxidative stress and male infertility--a clinical perspective. Hum Reprod Update. 2008 May-Jun;14(3):243-58. doi: 10.1093/humupd/dmn004. Epub 2008 Feb 14.
Zini A, San Gabriel M, Baazeem A Antioxidants and sperm DNA damage: a clinical perspective. J Assist Reprod Genet. 2009 Aug;26(8):427-32. doi: 10.1007/s10815-009-9343-5. Epub 2009 Sep 19.
Does Antioxidant Administration Improve Sperm Quality in Infertile Men
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
