Inthe corridor of the reproductive center, we often hear this conversation: "The embryo is an excellent embryo, and the inner membrane is also up to standard. Why is there no implantation?" Usually, the next inspection direction will turn to women. However, more and more clinical data reveal that a hidden male factor-high sperm DNA fragmentation rate-is quietly becoming an important culprit in repeated implant failures and early abortion.
1. What is the sperm DNA fragmentation rate? It's not a routine inspectionSimply put, the sperm DNA fragmentation rate reflects the integrity and stability of the genetic material (DNA) inside the sperm. You can think of it as a "design blueprint" for your life. A high fragmentation rate means that this "blueprint" is damaged, missing or full of errors.
Blind spots in routine semen examinations(,,)“”“”,“”“”,“”.Sperms with a high DNA fragmentation rate may have completely normal appearance and vitality.
Direct destructive powerDNA,.Such embryos either fail to implant, or stop growing due to poor development potential after implantation, manifested as biochemical pregnancy or early fetal arrest.
2. How does a high fragmentation rate "kill" the success rate of test tubes?
Second, how can a high fragment rate reduce the success rate of laboratory tests?
Reducing the potential for fertilization and embryo development: DNA damage can interfere with the normal combination of sperm and egg. Even if fertilization occurs, the resulting embryos may fail to progress during the early stages of division. This leads to high rates of blastocyst failure, or low-grade blastocyst ratings.
:,DNA,2-3.Even if the embryo barely implants, it is likely to "collapse" during subsequent development.
Impact on offspring health: Studies suggest that sperm DNA damage may be associated with an increased risk of certain genetic disorders in offspring.
3. Who should check?
,?How to check?
Experiencing ≥2 embryo transfer failures (especially high-quality embryos).
Have experienced ≥2 failed embryo transfers (especially with high-quality embryos).
There have been ≥2 natural miscarriages or fetal arrests due to unknown reasons.
The male partner has some unhealthy lifestyle habits, such as staying up late for long periods of time, smoking, excessive drinking, frequent visits to hot springs, and sitting for long periods of time.
The man is over 40 years old.
,.
Detection methods)semen sample)
Sperm chromatin structure analysis (SCSA): This method involves using flow cytometry to determine the integrity of sperm DNA.
Comet test: Observing the degree of damage to sperm DNA using a microscope.
TUNEL method: Used to detect sperm DNA damage through fluorescent labeling.
The current mainstream believes that DFI (DNA Fragment Index) ≤15% is normal, 15%-30% is a critical value, and>30% indicates serious damage and requires great attention.
4. What should I do if the debris rate is high? A comprehensive improvement strategy
1. Lifestyle revolution (basic and critical)
Strictlyquit smoking and alcohol: Tobacco and alcohol are clear reproductive toxic substances.
Avoid high-temperature environments: Stay away from saunas, hot springs, and prolonged baths in hot water. Also, avoid sitting for long periods of time and wearing tight-fitting clothing.
Ensure adequate sleep and manage stress effectively: Staying up late for long periods of time and experiencing high mental pressure can significantly increase oxidative stress levels, thereby damaging sperm DNA.
Enhance your antioxidant diet: consume more foods rich in vitamins C, E, zinc, selenium, and folic acid (such as dark-colored vegetables, nuts, oysters, tomatoes).
Treatment of primary disease: If varicocele exists, surgical ligation is considered for moderate or higher, and DFI can often be significantly improved after surgery.
Treatment of the underlying disease: If varicocele is present, surgical ligation should be considered for cases with moderate or severe symptoms. After surgery, DFI can often be significantly improved.
Antioxidant therapy: Under the guidance of a doctor, supplementing with coenzyme Q10, L-carnitine, vitamins, selenium, and other antioxidants is a common approach to reducing DFI in clinical settings.
Controlling infections: If there is a genital tract infection, it is necessary to undergo standardized anti-infective treatment first.
3.Optimization of reproductive laboratory technology
The sperm washing and optimizationlaboratory can select sperm with better vitality, better shape, and relatively less DNA damage through special density gradient centrifugation, upstream methods, etc.
IMSI/PICSIUnder high-powered microscopy, sperm with extremely normal morphology can be selected for fertilization. This method indirectly allows for the identification of sperm with lower levels of DNA damage.
Testicular sperm extractionFor patients with severe oligozoospermia and extremely high levels of DFI in the semen, the sperm within the testes tend to have more complete DNA than those ejaculated into the semen. Such sperm can be obtained through testicular biopsy.
Ms.
35435,3.The number of eggs retrieved each time is more than 10, but the quality of the embryos is very poor and the success rate of cyst cultivation is low. The doctor recommended checking the husband's sperm DNA fragmentation rate, and the results showed that the fragmentation rate was as high as 44.8%.
3(),DNA18%.During the fourth test tube, although only 8 eggs were retrieved, they were successfully transplanted and gave birth to a healthy baby.
6. From "unilateral efforts" to "joint efforts"
The test tube road has never been a woman's own walk alone.
,.When the results are not satisfactory, the scientific and rational approach is for both couples to jointly conduct in-depth investigations. Sperm DNA fragmentation rate, the key to opening the black box of "repeated failure", reminds us that to breed healthy life, two equally healthy seeds are needed.
,,,.Find the problem and you will find the way out. Many times, success does not require more complex technology, but just makes up for the most basic but always neglected link.
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