Related Experiment Video
Updated: Jun 21, 2026

08:48
Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects
Published on: April 21, 2022
Processing of semen can result in increased sperm DNA fragmentation
Estefanía Toro1, Silvia Fernández, Ana Colomar
1Institut Marquès, Service of Reproduction, Barcelona, Spain.
Fertility and Sterility
|July 18, 2009
Summary
Semen processing for assisted reproductive technologies, including incubation and cryopreservation, can increase sperm DNA fragmentation. This finding is crucial for optimizing fertility treatments and improving reproductive outcomes.
Area of Science:
- Reproductive biology
- Spermatozoa research
- Assisted Reproductive Technologies (ART)
Background:
- Assisted reproductive technologies (ART) involve complex semen processing steps.
- Maintaining sperm integrity during processing is vital for successful fertilization.
- Sperm DNA fragmentation can negatively impact ART outcomes.
Purpose of the Study:
- To investigate the impact of semen processing steps on sperm DNA fragmentation.
- To identify specific procedures that may elevate DNA damage in spermatozoa.
- To provide insights for optimizing semen handling protocols in ART.
Main Methods:
- Semen samples were subjected to standard processing procedures.
- Incubation at room temperature and cryopreservation were specifically analyzed.
- Sperm DNA fragmentation levels were quantified using established assays.
Main Results:
- Incubation of semen at room temperature was associated with increased sperm DNA fragmentation.
- Semen cryopreservation also led to elevated levels of sperm DNA fragmentation.
- These findings highlight potential risks associated with specific semen handling techniques.
Conclusions:
- Standard semen processing steps, particularly room temperature incubation and cryopreservation, can induce sperm DNA fragmentation.
- ART protocols should consider minimizing exposure to conditions that increase DNA damage.
- Further research is warranted to develop protective strategies against DNA fragmentation during semen processing.
Related Concept Videos
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...
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...
Spermatogenesis
Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...
Sperm Transport
The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
The maturation phase occurs in the epididymis, where sperm...
Fertilization
During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...

