Men have a biological clock too. Here’s what’s more likely when dads are over 50
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We hear a lot about women’s biological clock and how age affects the chance of pregnancy.
New research shows men’s fertility is also affected by age. When dads are over 50, the risk of pregnancy complications increases.
Data from more than 46 million births in the United States between 2011 and 2022 compared fathers in their 30s with fathers in their 50s.
While taking into account the age of the mother and other factors known to affect pregnancy outcomes, the researchers found every ten-year increase in paternal age was linked to more complications.
The researchers found that compared to couples where the father was aged 30–39, for couples where the dad was in his 50s, there was a:
- 16% increased risk of preterm birth
- 14% increased risk of low birth weight
- 13% increase in gestational diabetes.
The older fathers were also twice as likely to have used assisted reproductive technology, including IVF, to conceive than their younger counterparts.
Dads are getting older
In this US study, the mean age of all fathers increased from 30.8 years in 2011 to 32.1 years in 2022.
In that same period, the proportion of men aged 50 years or older fathering a child increased from 1.1% to 1.3%.
We don’t know the proportion of men over 50 years who father children in Australia, but data shows the average age of fathers has increased.
In 1975 the median age of Australian dads was 28.6 years. This jumped to 33.7 years in 2022.
How male age affects getting pregnant
As we know from media reports of celebrity dads, men produce sperm from puberty throughout life and can father children well into old age.
However, there is a noticeable decline in sperm quality from about age 40.
Female partners of older men take longer to achieve pregnancy than those with younger partners.
A study of the effect of male age on time to pregnancy showed women with male partners aged 45 or older were almost five times more likely to take more than a year to conceive compared to those with partners aged 25 or under. More than three quarters (76.8%) of men under the age of 25 years impregnated their female partners within six months, compared with just over half (52.9%) of men over the age of 45.
Pooled data from ten studies showed that partners of older men are also more likely to experience miscarriage. Compared to couples where the male was aged 25 to 29 years, paternal age over 45 years increased the risk of miscarriage by 43%.
Older men are more likely to need IVF
Outcomes of assisted reproductive technology, such as IVF, are also influenced by the age of the male partner.
A review of studies in couples using assisted reproductive technologies found paternal age under 40 years reduced the risk of miscarriage by about 25% compared to couples with men aged over 40.
Having a male under 40 years also almost doubled the chance of a live birth per treatment cycle. With a man over 40, 17.6% of treatment rounds resulted in a live birth, compared to 28.4% when the male was under 40.
How does male age affect the health outcomes of children?
As a result of age-related changes in sperm DNA, the children of older fathers have increased risk of a number of conditions. Autism, schizophrenia, bipolar disorders and leukaemia have been linked to the father’s advanced years.
A review of studies assessing the impact of advanced paternal age reported that children of older fathers have increased rates of psychiatric disease and behavioural impairments.
But while the increased risk of adverse health outcomes linked to older paternal age is real, the magnitude of the effect is modest. It’s important to remember that an increase in a very small risk is still a small risk and most children of older fathers are born healthy and develop well.
Improving your health can improve your fertility
In addition to the effects of older age, some chronic conditions that affect fertility and reproductive outcomes become more common as men get older. They include obesity and diabetes which affect sperm quality by lowering testosterone levels.
While we can’t change our age, some lifestyle factors that increase the risk of pregnancy complications and reduce fertility, can be tackled. They include:
- smoking
- recreational drug taking
- anabolic steroid use
- heavy alcohol consumption.
Get the facts about the male biological clock
Research shows men want children as much as women do. And most men want at least two children.
Yet most men lack knowledge about the limitations of female and male fertility and overestimate the chance of getting pregnant, with and without assisted reproductive technologies.
We need better public education, starting at school, to improve awareness of the impact of male and female age on reproductive outcomes and help people have healthy babies.
For men wanting to improve their chance of conceiving, the government-funded sites Healthy Male and Your Fertility are a good place to start. These offer evidence-based and accessible information about reproductive health, and tips to improve your reproductive health and give your children the best start in life.
Karin Hammarberg, Senior Research Fellow, Global and Women’s Health, School of Public Health & Preventive Medicine, Monash University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The End of Stress – by Don Joseph Goewey
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So, we probably know to remember to take a deep breath once in a while, and adopt a “focus on what you can control, rather than what you can’t” attitude. In this book, Goewey covers a lot more.
After an overview of how we have a brain wired for stress, what it does to us, and why we should rewire that, he dives straight into such topics as:
- Letting go of fear—safely!
- Number-crunching the real risks
- Leading with good decisions, and trusting the process
- Actively practicing a peaceful mindset (some very good tips here)
- Transcending shame (and thus sidestepping the stress that it may otherwise bring)
The book brings together a lot of ideas and factors, seamlessly. From scientific data to case studies, to “try this and see”, encouraging us to try certain exercises for ourselves and be surprised at the results.
All in all, this is a great book on not just managing stress, but—as the title suggests—ending it in all and any cases it’s not useful to us. In other words, this book? It is useful to us.
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It’s Not Fantastic To Be Plastic
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We Are Such Stuff As Bottles Are Made Of
We’ve written before about PFAS, often found in non-stick coatings and the like:
PFAS Exposure & Cancer: The Numbers Are High
Today we’re going to be talking about microplastics & nanoplastics!
What are microplastics and nanoplastics?
Firstly, they’renot just the now-banned plastic microbeads that have seen some use is toiletries (although those are classified as microplastics too).
Many are much smaller than that, and if they get smaller than a thousandth of a millimeter, then they get the additional classification of “nanoplastic”.
In other words: not something that can be filtered even if you were to use a single-micron filter. The microplastics would still get through, for example:
Scientists find about a quarter million invisible nanoplastic particles in a liter of bottled water
And unfortunately, that’s bad:
❝What’s disturbing is that small particles can appear in different organs and may cross membranes that they aren’t meant to cross, such as the blood-brain barrier❞
Note: they’re crossing the same blood-brain barrier that many of our nutrients and neurochemicals are too big to cross.
These microplastics are also being found in arterial plaque
What makes arterial plaque bad for the health is precisely its plasticity (the arterial walls themselves are elastic), so you most certainly do not want actual plastic being used as part of the cement that shouldn’t even be lining your arteries in the first place:
Microplastics found in artery plaque linked with higher risk of heart attack, stroke and death
❝In this study, patients with carotid artery plaque in which MNPs were detected had a higher risk of a composite of myocardial infarction, stroke, or death from any cause at 34 months of follow-up than those in whom MNPs were not detected❞
~ Dr. Raffaele Marfella et al.
(MNP = Micro/Nanoplastics)
Source: Microplastics and Nanoplastics in Atheromas and Cardiovascular Events
We don’t know how bad this is yet
There are various ways this might not be as bad as it looks (the results may not be repeated, the samples could have been compromised, etc), but also, perhaps cynically but nevertheless honestly, it could also be worse than we know yet—only more experiments being done will tell us which.
In the meantime, here’s a rundown of what we do and don’t know:
Study links microplastics with human health problems—but there’s still a lot we don’t know
Take care!
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Fiber Fueled – by Dr. Will Bulsiewicz
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We generally know that for gut health we should eat fiber, but what of the balances of different sorts of fiber?
That’s one of the main things that make this book stand out—fostering diversity in our microbiome by fostering diversity in our diet. Specifically, diversity of fiber-containing foods.
The book is part “science made easy for the lay reader”, and part recipe book. The recipes come with shopping lists and a meal planner, though we would recommend to use those as a guide rather than to try to adhere perfectly to them.
In particular, this reviewer would encourage much more generous use of healthful seasonings… and less reliance on there being leftovers several days later (tasty food gets gone quickly in this house!)
As for the science, the feel of this is more like reading a science-based observational documentary with explanations, than of reading a science textbook. Studies are mentioned in passing, but not dissected in any detail, and the focus is more on getting the key learnings across.
Bottom line: if you’d like to boost not just the amount, but also the diversity, of fiber in your diet, and reap the gut-health rewards, this book is a great guide for that!
Click here to get your copy of “Fiber Fueled” from Amazon today!
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Managing Major Chronic Diseases – by Alexis Dupree
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Our author, Alexis Dupree, is herself in her 70s, and writing with more than three decades of experience of surviving multiple chronic diseases (in her case, Multiple Sclerosis, and then a dozen comorbidities that came with such).
She is not a doctor or a scientist, but for more than 30 years she’s been actively working to accumulate knowledge not just on her own conditions, but on the whole medical system, and what it means to be a “forever patient” without giving up hope.
She talks lived-experience “life management” strategies for living with chronic disease, and she talks—again from lived experience—about navigating the complexities of medical care; not on a legalistic “State regulations say…” level, because that kind of thing changes by the minute, but on a human level.
Perhaps most practically: how to advocate strongly for yourself while still treating medical professionals with the respect and frankly compassion that they deserve while doing their best in turn.
But also: how to change your attitude to that of a survivor, and yet also redefine your dreams. How to make a new game plan of life—while working to make life easier for yourself. How to deal, psychologically, with the likelihood that not only will you probably not get better, but also, you will probably get worse, while still never, ever, giving up.
After all, many things are easily treatable today that mere decades ago were death sentences, and science is progressing all the time. We just have to stay alive, and in as good a condition as we reasonably can, to benefit from those advances!
Bottom line: if you have a chronic disease, or if a loved one does, then this is an immensely valuable book to read.
Click here to check out Managing Major Chronic Diseases, and make life easier!
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Women’s Strength Training Anatomy Workouts – by Frédéric Delavier
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We’ve previously reviewed another book of Delavier’s, “Women’s Strength Training Anatomy“, which itself is great. This book adds a lot of practical advice to that one’s more informational format, but to gain full benefit of this one does not require having read that one.
A common reason that many women avoid strength-training is because they do not want to look muscular. Largely this is based on a faulty assumption, since you will never look like a bodybuilder unless you also eat like a bodybuilder, for example.
However, for those for whom the concern remains, today’s book is an excellent guide to strength-training with aesthetics in mind as well as functionality.
The exercises are divided into sections, thus: round your glutes / tone your quadriceps / shape your hamstrings / trim your calves / flatten your abs / curve your shoulders / develop a pain-free upper back / protect your lower back / enhance your chest / firm up your arms.
As you can see, a lot of these are mindful of aesthetics, but there’s nothing here that’s antithetical to function, and some (especially for example “develop a pain-free upper back” and “protect your lower back“) are very functional indeed.
Bottom line: Delavier’s anatomy and exercise books are top-tier, and this one is no exception. If you are a woman and would like to strength-train (or perhaps you already do, and would like to refine your training), then this book is an excellent choice.
Click here to check out Women’s Strength Training Anatomy Workouts, and have the body you want!
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Do you have knee pain from osteoarthritis? You might not need surgery. Here’s what to try instead
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Most people with knee osteoarthritis can control their pain and improve their mobility without surgery, according to updated treatment guidelines from the Australian Commission on Safety and Quality in Health Care.
So what is knee osteoarthritis and what are the best ways to manage it?
Pexels/Kindelmedia More than 2 million Australians have osteoarthritis
Osteoarthritis is the most common joint disease, affecting 2.1 million Australians. It costs the economy A$4.3 billion each year.
Osteoarthritis commonly affects the knees, but can also affect the hips, spine, hands and feet. It impacts the whole joint including bone, cartilage, ligaments and muscles.
Most people with osteoarthritis have persistent pain and find it difficult to perform simple daily tasks, such as walking and climbing stairs.
Is it caused by ‘wear and tear’?
Knee osteoarthritis is most likely to affect older people, those who are overweight or obese, and those with previous knee injuries. But contrary to popular belief, knee osteoarthritis is not caused by “wear and tear”.
Research shows the degree of structural wear and tear visible in the knee joint on an X-ray does not correlate with the level of pain or disability a person experiences. Some people have a low degree of structural wear and tear and very bad symptoms, while others have a high degree of structural wear and tear and minimal symptoms. So X-rays are not required to diagnose knee osteoarthritis or guide treatment decisions.
Telling people they have wear and tear can make them worried about their condition and afraid of damaging their joint. It can also encourage them to try invasive and potentially unnecessary treatments such as surgery. We have shown this in people with osteoarthritis, and other common pain conditions such as back and shoulder pain.
This has led to a global call for a change in the way we think and communicate about osteoarthritis.
What’s the best way to manage osteoarthritis?
Non-surgical treatments work well for most people with osteoarthritis, regardless of their age or the severity of their symptoms. These include education and self-management, exercise and physical activity, weight management and nutrition, and certain pain medicines.
Education is important to dispel misconceptions about knee osteoarthritis. This includes information about what osteoarthritis is, how it is diagnosed, its prognosis, and the most effective ways to self-manage symptoms.
Health professionals who use positive and reassuring language can improve people’s knowledge and beliefs about osteoarthritis and its management.
Many people believe that exercise and physical activity will cause further damage to their joint. But it’s safe and can reduce pain and disability. Exercise has fewer side effects than commonly used pain medicines such as paracetamol and anti-inflammatories and can prevent or delay the need for joint replacement surgery in the future.
Many types of exercise are effective for knee osteoarthritis, such as strength training, aerobic exercises like walking or cycling, Yoga and Tai chi. So you can do whatever type of exercise best suits you.
Increasing general physical activity is also important, such as taking more steps throughout the day and reducing sedentary time.
Weight management is important for those who are overweight or obese. Weight loss can reduce knee pain and disability, particularly when combined with exercise. Losing as little as 5–10% of your body weight can be beneficial.
Pain medicines should not replace treatments such as exercise and weight management but can be used alongside these treatments to help manage pain. Recommended medicines include paracetamol and non-steroidal anti-inflammatory drugs.
Opioids are not recommended. The risk of harm outweighs any potential benefits.
What about surgery?
People with knee osteoarthritis commonly undergo two types of surgery: knee arthroscopy and knee replacement.
Knee arthroscopy is a type of keyhole surgery used to remove or repair damaged pieces of bone or cartilage that are thought to cause pain.
However, high-quality research has shown arthroscopy is not effective. Arthroscopy should therefore not be used in the management of knee osteoarthritis.
Joint replacement involves replacing the joint surfaces with artificial parts. In 2021–22, 53,500 Australians had a knee replacement for their osteoarthritis.
Joint replacement is often seen as being inevitable and “necessary”. But most people can effectively manage their symptoms through exercise, physical activity and weight management.
The new guidelines (known as “care standard”) recommend joint replacement surgery only be considered for those with severe symptoms who have already tried non-surgical treatments.
I have knee osteoarthritis. What should I do?
The care standard links to free evidence-based resources to support people with osteoarthritis. These include:
- education, such as a decision aid and four-week online course
- self-directed online exercise and yoga programs
- weight management support
- pain management strategies, such as MyJointPain and painTRAINER.
If you have osteoarthritis, you can use the care standard to inform discussions with your health-care provider, and to make informed decisions about your care.
Belinda Lawford, Postdoctoral research fellow in physiotherapy, The University of Melbourne; Giovanni E. Ferreira, NHMRC Emerging Leader Research Fellow, Institute of Musculoskeletal Health, University of Sydney; Joshua Zadro, NHMRC Emerging Leader Research Fellow, Sydney Musculoskeletal Health, University of Sydney, and Rana Hinman, Professor in Physiotherapy, The University of Melbourne
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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