The idea that baldness always comes from the mother's side is one of the most persistent misconceptions about hair loss. It has an appealing quality: a simple formula. Look at your mother's father, and you see your future.
But it doesn't work that way. It's a bit more complicated; read on to find out how it really works.
Where does the "from the mother's side" story come from?
There's a grain of truth to it. There's a gene on the X-chromosome that plays a role in hereditary hair loss: the AR gene, which codes for the androgen receptor. Men have one X-chromosome, which they receive from their mother. If this receptor is sensitive to DHT, the hormone responsible for most male baldness, it increases the likelihood of hair loss.
Hence the story of the mother's side. And that's not entirely wrong.
But it's not entirely correct either. Because the AR gene is not the only gene involved, and certainly not the only decisive one.
How does heredity really work for male baldness?
In recent years, scientists have found hundreds of genes that contribute to male hair loss. A major British study from 2017, published in PLOS Genetics, identified over 287 genetic variants associated with male baldness. They came from both the mother and the father, spread across almost all chromosomes.
The conclusion was clear: hereditary hair loss is a complex interplay of dozens of genes. Not one gene, not one parent. The AR gene on the X-chromosome plays a role, but it's far from the complete story.
What is true: if male hair loss is prominent in your family, you have a higher chance. But "prominent" then refers to both sides of the family, not just the mother's side.
What does your family history REALLY say?
There is no formula that can predict with certainty whether you will go bald. But there are factors that increase the risk. If your father went bald early, that increases your risk. If your mother's father had early hair loss, that also counts. If there is a visible pattern among men on both sides of the family, there is a good chance that you are also susceptible.
But it remains a chance, not a certainty. Even if all men in your family are bald, that doesn't mean it will be true for you. And vice versa: men with no baldness in the family can still develop it.
Also, don't lose sight of the fact that many men with a genetic predisposition notice the first signs early. Between the ages of 18 and 25, a significant portion of men start to experience a receding hairline or thinning at the crown. This is not necessarily a disaster, but it is a signal to take seriously.
The role of DHT in hereditary baldness
The mechanism behind hereditary baldness is called androgenetic alopecia. It has everything to do with DHT, a hormone made from testosterone. In men with a genetic sensitivity, DHT molecules bind to hair follicles, particularly on the crown and along the hairline.
This shortens the hair growth cycle. Hairs grow for less time, become thinner, and eventually, growth stops completely in those areas.
The difference isn't in the amount of DHT a person produces, but in how sensitive their follicles are to that hormone. Someone with low DHT but highly sensitive follicles can go bald just as easily as someone with high DHT but resistant follicles. This sensitivity is largely genetically determined. That's why heredity is such a major factor.
Can you tell if you're going to go bald?
The most honest indicator is your own scalp. If you notice your hairline changing slightly, your crown thinning, or you consistently losing more hair than before, these are signals you should take seriously.
Take a photo of your hairline and crown every two months, from the same spot, with the same light. Changes that are barely visible to the naked eye will become apparent in photos over a longer period.
Also look at your family history, but look broadly. Not just at your mother's father, but at the men on both sides. If your father had a clear receding hairline at 25 and the men on your mother's side had full hair at 60, then it's likely your father's genes that are decisive.
But be realistic: even a detailed family history offers no guarantee of which way it will go.
What can you do if baldness runs in your family?
The honest message: you cannot change your heredity. The sensitivity of your follicles to DHT is in your DNA. But that doesn't mean you can't do anything.
Starting early helps. This is perhaps the most substantiated principle in hair loss. Hair follicles that are still active can be supported. Follicles that have been inactive for a long time are harder or impossible to reactivate. The earlier you intervene when you notice the first signs, the more hair you can retain.
Medications such as finasteride and dutasteride reduce the production of DHT in the body. They are effective but have side effects that you should seriously consider beforehand. That is a choice you make together with a doctor, not something you just start on your own.
If you prefer to work without medication, there are topical options that can improve the environment for your hair follicles. The Hairborn Growth Serum contains ingredients such as Redensyl and Procapil that support the hair growth cycle and nourish the follicles, without the systemic effects of medication. It does not negate genetic predisposition, but can slow down deterioration if you act early.
What to take away from this story
Baldness does not exclusively come from the mother's side. It is a complex interplay of dozens of genes, from both parents. The AR gene on the X-chromosome plays a role, but it is only a part of the whole.
If hereditary baldness runs in your family, it increases your chances. But it is not a condemnation, and the "from the mother's side" formula is too simple to rely on. Look at the full family history, pay attention to the signs you already see yourself, and act early if you want to tackle it. Timing makes a bigger difference than most people realize.
Frequently Asked Questions
Can you get a DNA test to determine your risk?
There are commercial genetic tests that look for specific risk markers, including variants of the AR gene, but these provide a risk indication and not a certain prediction. They also don't always take into account all hundreds of genes that play a role.
Does a full head of hair on your grandfather mean you'll also be spared?
No, that offers no guarantee. Because hundreds of genes from both parents are involved, you could have a full head of hair on your maternal grandfather and still be susceptible to baldness yourself through other genetic variants, for example from your father's side.
Can identical twins still go bald differently?
Yes, even though identical twins have the same genes, they can still experience a different course of hair loss due to differences in hormone levels, lifestyle, or other non-genetic factors that influence the expression of those same genes.
Does ethnicity play a role in the chance of hereditary hair loss?
Yes, research suggests that the prevalence and pattern of androgenetic alopecia can vary between ethnic groups, possibly due to differences in the distribution of susceptible genetic variants. This is still an area where research continues to evolve.
Can you tell from female family members if you have the AR gene?
No, the AR gene is expressed through androgen receptors that are primarily relevant for male hormone sensitivity, so you cannot infer this from the hair of female family members, who express this gene differently.
Is there a link between early graying and hereditary hair loss?
There is no strong evidence for a direct genetic link between early graying and hereditary hair loss. These are two separate processes that both involve aging of the hair follicle, but proceed through different pathways.
Can environmental factors strengthen or weaken genetic predisposition?
Yes, environmental factors such as stress, smoking, and overall health can influence how quickly a genetic predisposition manifests, even though they do not change the underlying genes themselves. A healthy lifestyle can therefore potentially contribute to a slightly more favorable outcome.
Is the chance higher if both parents have a family history of hair loss?
Yes, generally speaking, the more family members on both sides who have experienced early or extensive hair loss, the greater the chance that the relevant genetic variants are also present in you. However, it remains an increased chance, not a certainty.
Can you deduce from your children's genes whether you yourself will go bald?
No, that is not possible without specific genetic research. The genes you pass on to your children do not definitively tell you which combination of genes you yourself have inherited and are expressing.
Is scientific insight into the heredity of baldness still changing?
Yes, research into the genetics of hair loss is still evolving, with regular new studies identifying additional genetic variants. The picture of hundreds of genes involved from 2017 has now been further refined, although the core message that it is a complex interplay remains the same.
