Related Experiment Video
Updated: Jun 6, 2026

08:48
Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
Published on: April 21, 2022
Clinical implications of sperm DNA damage
1Centre for Public Health, Institute of Clinical Science, Queens University of Belfast, Northern Ireland, UK.
Human Fertility (Cambridge, England)
|December 2, 2010
Summary
Sperm DNA damage testing shows promise for diagnosing male infertility and predicting assisted reproductive technology (ART) success. This study investigates its relationship with in vitro fertilization and ICSI pregnancy rates.
Area of Science:
- Andrology
- Reproductive Medicine
- Genetics
Background:
- Traditional semen analysis lacks predictive value for male fertility and assisted reproductive technology (ART) outcomes.
- Intracytoplasmic sperm injection (ICSI) has diminished the perceived need for conventional sperm quality tests.
- Research funding in andrology has been insufficient, hindering advancements in ART success rates.
Purpose of the Study:
- To investigate the diagnostic and prognostic value of sperm DNA damage testing in male infertility.
- To assess the relationship between sperm DNA damage and in vitro fertilization (IVF) and ICSI pregnancy rates.
Main Methods:
- Utilized the Comet assay to measure sperm DNA fragmentation.
- Employed a novel test to quantify modified DNA bases, indicating oxidative DNA injury.
- Correlated sperm DNA damage levels with IVF and ICSI outcomes, including pregnancy rates.
Main Results:
- Sperm DNA damage is strongly associated with numerous fertility outcomes.
- Negative correlations were observed with fertilization, embryo quality, and implantation rates.
- Positive correlations were found with miscarriage rates and the incidence of childhood diseases.
Conclusions:
- Sperm DNA damage testing holds significant potential as a diagnostic tool for male infertility.
- Assessing sperm DNA integrity can serve as a prognostic indicator for ART success.
- Further research and funding are crucial to advance andrological diagnostics and improve ART efficacy.
Related Concept Videos
Spermatogenesis
Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
Infertility in Males
Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...
Sperm Structure and Semen Composition
During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...
DNA Damage can Stall the Cell Cycle
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
DNA Damage Can Stall the Cell Cycle
In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...
Overview of DNA Repair
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
Chemically...

