Male sperm is crucial for procreation, yet smoking and drinking have become commonplace for many men due to work demands. Both tobacco and alcohol, when consumed excessively, can impair sperm quality and thus affect fertility. So how can men protect their sperm? Let's explore below.
Methods to Protect Male Sperm
1. Effects of Smoking and Alcohol on Sperm
Multiple factors, including increased vulnerability to damage and reduced self-repair capacity in sperm cells, can lead to sperm abnormalities. Heavy smoking causes abnormal sperm, and long-term smokers also experience a decrease in normal sperm count, averaging about 10%.Those smoking 21-30 cigarettes daily show a significantly higher rate of abnormal sperm; those smoking over 30 cigarettes daily have an even higher rate. The longer the smoking duration, the more abnormal sperm are produced. As the number of normal sperm decreases, sperm motility also weakens. Experts recommend waiting at least six months after quitting smoking before trying to conceive.
Additionally, an analysis of over 5,000 pregnant women revealed that those whose husbands smoked more than 10 cigarettes daily experienced a significantly higher rate of prenatal fetal death. The mortality rate increased with greater smoking intensity. Furthermore, women whose husbands smoked were approximately 2.5 times more likely to give birth to children with birth defects than those whose husbands did not smoke.
Alcohol exhibits testicular toxicity: it reduces sperm density, increases sperm abnormalities, and may cause infertility. Compared to healthy controls, heavy drinkers show significantly lower serum testosterone, luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels.Alcohol abuse increases oxidative stress, damaging testicular interstitial cells and supporting cells while impairing the hypothalamic-pituitary-gonadal axis. 2. Unbalanced Diet Some men have monotonous diets, exhibit picky eating habits, or avoid animal-based foods. Nutrients like zinc, selenium, copper, phosphorus, calcium, vitamin E, and vitamin A are crucial for sperm production.
1) Insufficient high-quality protein intake
Protein is a vital cellular component and essential raw material for sperm production. Adequate supplementation with high-quality protein-rich foods helps regulate male endocrine function and enhances sperm quantity and quality.
2) Vitamins and Trace Elements
Minerals and trace elements in the human body exert equally significant impacts on male fertility. The most common are zinc and selenium, which participate in testosterone synthesis and transport while enhancing sperm motility and reproductive physiological activities like fertilization. Zinc regulates immune system function and improves sperm motility.Zinc deficiency in the body can lead to reduced sperm count, increased abnormal sperm, and infertility. Selenium deficiency reduces the energy sources required for sperm motility, decreasing sperm activity.
Therefore, men with unbalanced or selective eating habits may experience impaired production of high-quality sperm due to nutritional deficiencies.
3. High Temperatures
Normal human body surface temperature ranges from 35-36°C, with abdominal cavity temperature at 39°C. The scrotum maintains an optimal temperature of 32-34°C.This indicates that the optimal temperature for sperm production in the testes is lower than the commonly cited body temperature. High temperatures damage sperm, primarily manifesting as reduced sperm density in semen, decreased motility, increased abnormal sperm, and diminished fertilization capacity, leading to infertility.
Therefore, during hot summers, pay special attention to the following points:
1) Avoid saunas and hot baths: Saunas and hot baths expose the testicles directly to hot water for extended periods, inhibiting sperm development and preventing scrotal temperature regulation. When testicular temperature exceeds 40°C for over 30 minutes per session, sperm quality significantly declines.
2) Avoid tight pants: Tight pants impede testicular blood circulation and hinder heat dissipation.
3) Prolonged sitting and computer use: Computers generate significant heat during operation. Prolonged sitting restricts airflow, further impairing testicular heat dissipation.
4. Excessive Sexual Activity
Our urology clinic advises patients to abstain for 3-7 days before semen analysis, as this period yields optimal semen quality. However, excessive masturbation, premature sexual activity, or frequent intercourse can lead to erectile dysfunction and reduced sperm count per ejaculation, thereby impairing fertility.
5. Medications and Radiation
Five common classes of drugs affecting male fertility include:
1) Hormonal Drugs
Use of estrogen, progesterone, or testosterone propionate can suppress pituitary gonadotropin secretion, thereby inhibiting testicular spermatogenesis.
2) Direct Spermatogenesis Inhibitors
Examples include dichlorodiamidine, an insecticide that also suppresses sperm production;Other agents like dinitropyridines, nitrofuran derivatives, anticancer alkylating agents, and the recently studied gossypol extracted from cottonseed all powerfully suppress testicular spermatogenesis.
3) Drugs affecting sperm maturation
Compounds like the antiandrogen medroxyprogesterone acetate and chlorinated glycerol derivatives, while having minimal impact on testicular spermatogenesis, directly affect mature sperm. They prevent sperm from reaching full maturity and thus lose their fertilization capacity.
4) Drugs affecting ejaculation
Hypertension medications like guanethidine and methyldopa can reduce ejaculate volume or even cause anejaculation. Certain drugs suppress the ejaculatory reflex, delaying ejaculation—examples include amytal and chlorpromazine.
5) Many topical medications
Substances like surfactants, organometallic compounds (e.g., mercury acetate), and weak acids possess direct spermicidal effects. Frequent use of such topical treatments for female reproductive tract conditions—such as vaginal suppositories—inevitably impacts fertility.Regular use of sedatives, antineoplastic drugs, chemotherapeutic agents like melphalan, furan derivatives, and hormonal medications can cause sperm growth disorders, chromosomal damage, and breaks. Significant exposure to radiation can also induce chromosomal abnormalities in sperm.
6. Emotional Factors
1) Middle-aged men serve as the backbone of contemporary society, often at the peak of their careers with significant responsibilities. They frequently lack adequate rest and relaxation, with late nights and overtime being commonplace. Sandwiched between demanding superiors andand employees below, bearing immense pressure. This makes them highly susceptible to endocrine disorders, which can even suppress testicular spermatogenesis. Prolonged fatigue and prolonged sitting can also impair testicular blood circulation, leading to supply issues. Therefore, adequate rest and appropriate relaxation are essential. When a man is energetic, his sperm will be energetic too.
2) Avoid excessive stress. Anxiety disrupts endocrine levels. Testosterone plays a vital role in sperm development and negatively impacts male sexual function. Rushing things won't help; prolonged failure can cause anxiety, adversely affecting daily life and work.
From the above, we see that men seeking to protect their sperm should not only avoid excessive smoking and drinking but also limit frequent sexual intercourse. Frequent intercourse can reduce sperm count, lowering conception rates. Men planning to start a family should avoid the situations described above.