Biological Clock



This is no longer a secret that men fertility is affected by age. While the public attention is towards women (and men fertility is almost a ‘taboo’), the fact that men have a biological clock too cannot be ignored anymore.

Increasing male age is associated with a significant decline in fertility and increased risk for health issues in offspring. Men need to be aware of the effects of the male biological clock on sexual and reproductive health.

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Age Impact on Male Fertility

Male age is accompanied by physiological changes in the testicles, seminal vesicles, prostate and epididymis. These physical factors may contribute towards decreased sperm motility (the sperm’s ability to move), sperm morphology (the sperm’s ability to dissolve the outer surface of an egg and fertilize it), sperm count (concentration of sperm per ejaculation) and semen volume.

Increasing age implies more frequent exposure to exogenous damage or disease that may harm male fertility. With age, the continuous exposure to alcohol, smoking, obesity, stress, wireless networks and cell phone radiation, increases. This as well contributes to the decline of a man’s sperm quality over time.

Researches show that that men over 35 years old are twice as likely to be infertile as are men under 25 years old. An interesting research was led by Laura Dodge at the Beth Israel Deaconess Medical Center and Harvard Medical School in Boston that investigated the impact of a man’s age on a couple’s chances of having a baby. After studying records of nearly 19,000 IVF (In Vitro Fertilization) treatment cycles in the Boston area between 2000 and 2014, the conclusion of the research was that younger women’s chances to conceive are influenced by the man’s age. Women younger than 30 with a male partner aged 30 to 35 had a 73% chance of a live birth after IVF. This success rate fell to 46% when the man was aged 40 to 42.

Father’s Age Impact the Health of His Offspring

Additional crucial factor associated with men’s age is the health of his fetus.

Researches show that the frequency of numerical and structural abnormalities in sperm chromosomes increase with men’s age. Sperm, unlike women’s eggs, are made constantly throughout a man’s life. With each cell division, the entire genome is copied, and with three billion base pairs packed into 23 pairs of chromosomes, errors can occur in replication. The older men are, the more times their reproductive cells have continuously divided, generating new genetic material. This increases the probability of replication errors and the accumulation of genetic mutations to be transferred to the fetus.

In simpler words, with age, the quality control mechanisms in sperm production begin to fail. This increase the likelihood of the creation of genetic mutation to be transferred to the fetus through the sperm, which may cause serious problems to the fetus health, including: miscarriages, preterm birth, preterm death, birth defects, autism, schizophrenia, bipolar disorder, epilepsy and certain cancers in offspring.

The diagram below summaries in high-level the increased risks of fathering in a later age:

* This graph is our summary of many articles, researches and resources which a few of them are detailed below.

At What Age Does Male Fertility Decline?

Studies have shown that male fertility starting to decline at his early 30’s. We know that this fact might take you by surprise, especially if you believed until now that you can have kids in the conventional way whenever you want.

One man’s biological clock may run faster than another. The speed of ticking depends on how well the man take care of himself and his overall health, including what he eats, whether he smokes and how much he exercises.

Here is the thing: Charlie Chaplin, Pablo Picasso and Rod Stewart (who had babies at 73, 67 and 66) are the exception, not the rule.

How to Stop Men Biological Clock from Ticking

Man, your biological clock is ticking, and there is not a lot you could do about it. But don’t be stressed, with’s solution, you can continue living your life in your own rhythm, with no worries about having kids in an older age.

To learn more about our home sperm freezing kit, costs and our process, click here.

The Solution – Freeze and Store Your Sperm

Cryopreservation of male fertility is a proven, simple and cost-efficient solution for keeping your family dream alive. offers the possibility to freeze and store your sperm from the comfort of your own home and ship it overnight, in a chain of custody, to our FDA® lab. Your sperm will be tested and stored at our lab until you will be ready to become a parent. Order our affordable home sperm freezing kit today, to secure your future.

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The Male Biological Clock: The Startling News About Aging, Sexuality, and Fertility in Men, By Harry Fisch
The male biological clock is ticking: a review of the literature, Universidade de Caxias do Sul (UCS), Caxias do Sul, Rio Grande do Sul, and Association Institute Sapientiae, São Paulo, Brazil
Babycenter [dot] co [dot] uk, Link
Healthland [dot] time [dot] com, Link
The Turek Clinic [dot] com, Link
The Guardin [dot] com, Link
RBEJ [dot] biomedcentral [dot] com, Link
New York Times [dot] com, Link



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