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Journal Article
Meta-Analysis
Review
Review: Diagnosis and impact of sperm DNA alterations in assisted reproduction.
Sperm nuclear and chromatin abnormalities are common among infertile men and are known to influence natural reproduction. These abnormalities are also considered detrimental to normal fertilization, embryo development, and successful implantation and pregnancies following assisted reproductive treatment (ART). Abnormalities in the sperm nucleus can be broadly classified into sperm chromosomal abnormalities (aneuploidies) and sperm DNA abnormalities such as abnormal packing, DNA integrity, or DNA fragmentation. For the past 30 years, numerous tests have been developed to quantify these abnormalities in sperm. In this chapter, we review the causes of sperm DNA and chromosomal abnormalities, describe the commonly used tests to evaluate these abnormalities, and finally review the impact of these abnormalities on male fertility and ART outcomes. We also performed a comprehensive meta-analysis and systematic review from the existing literature to summarize the effect of sperm DNA fragmentation on ART outcomes such as fertilization rate, embryo quality, and clinical pregnancies. A review of the literature presented in this chapter suggests that sperm nuclear and chromatin abnormalities are associated with male infertility, and they reduce the probability of a successful pregnancy following ART.
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