Male pattern baldness is androgenetic alopecia: a progressive hair loss localised on the top of the scalp, linked at once to androgens, to heredity and to time. It differs from temporary shedding, which is often diffuse and reversible, and its course plays out over years.
You want to know whether what you are losing is really baldness, where it comes from, at what age it sets in and how far it will go? This guide answers in that order, sources included: definition, causes, heredity, age and progression, stages, the male and female patterns, then what can honestly be done — and what a cosmetic cannot do.
Male pattern baldness: what exactly are we talking about?
In medicine, the word "baldness" means androgenetic alopecia, particularly in men. In this form, only the top of the scalp is affected: the hair around the sides is preserved, and it is this persistent ring of hair that is called the "Hippocratic wreath" (VIDAL — Androgenetic alopecia). On top, the hairs become finer and often less pigmented, thin out, then gradually give way to a downy hair that disappears in turn.
The French Society of Dermatology adds a useful nuance: it is not a disease in the strict sense, but a natural, ordinary and frequent process that gradually worsens with age (Dermato-INFO — Everything you need to know about androgenetic alopecia). In other words, baldness is neither a sign of poor health nor a fault: it is a common development whose mechanism can be described.
The difference from simple hair loss comes down to three features. Androgenetic alopecia is localised (the top of the scalp, the temples, the crown), progressive (months, years) and lasting. Ordinary or temporary shedding is often the opposite: diffuse (the whole scalp) and reversible, like the telogen effluvium that appears two to three months after childbirth, a fever or a shock (Dermato-INFO — Everything you need to know about alopecia). A useful reminder: losing 50 to 100 hairs a day is normal and has nothing to do with baldness.
In women, diffuse shedding has its own explanations — postpartum, iron deficiency, thyroid — which we detail in hair loss in younger women.
The causes of baldness: genes, hormones and time
The French Society of Dermatology puts it plainly: androgenetic alopecia results from the combined influence of three inseparable factors — androgens (male hormones, also present in small quantities in women), a genetic predisposition, and time (Dermato-INFO).
The mechanism takes a few lines. In predisposed people, testosterone is converted into a more active form, DHT (dihydrotestosterone), which acts on certain follicles on top of the scalp. The baldness causes then a progressive miniaturisation of those follicles: hairs grow back finer, shorter and fewer in number, down to an almost invisible down (Dermato-INFO).
VIDAL adds the decisive image: the hair growth cycle speeds up and shortens, so that the twenty to twenty-five cycles meant to cover a whole lifetime run out within a few years. The follicles at the sides of the scalp, less sensitive to the hormone, are far less affected — hence the ring of hair that persists.
What is not to blame. Some beliefs die hard, and the French Society of Dermatology lists them plainly: massaging the scalp, cutting your hair at the full moon, shaving your head to "strengthen" the hair or doing headstands have no demonstrated effect. Wearing a cap or a helmet regularly does not make baldness worse. Stress, for its part, can play a modest role in the intensity or the triggering of shedding, but it is not the main cause.
And a deficiency? An iron or vitamin D deficiency causes diffuse shedding over the whole scalp, not a localised androgenetic baldness. The nuance has a practical consequence: that kind of shedding is looked for in a blood test, prescribed by a doctor, and supplementation taken at random corrects nothing when the results are normal.
Hereditary hair loss: from your mother or your father?
Short answer: from both, but the maternal story is very real.
What people repeat — "baldness comes from the mother" — rests on a verified fact. One of the key genes, the androgen receptor (AR) gene, sits on the X chromosome, which men inherit from their mother. Hillmer's team showed it in 2005: variation in this gene is the cardinal prerequisite for early androgenetic alopecia, with an aetiological fraction of around 0.46, and its location on the X chromosome "underlines the importance of the maternal line" (Hillmer et al., 2005). VIDAL puts it otherwise: in men, the likelihood of suffering from baldness is higher when it is present in the maternal family.
But the genetics of baldness does not stop at one gene, nor at one parent. In a study of 52,874 men from the UK Biobank (aged 40 to 69), the association analysis identified 247 independent regions of the autosomal genome and estimated that 47.3% of the variance in baldness is explained by common autosomal variants, against 4.6% for the X chromosome (Hagenaars et al., 2017). Those regions are transmitted by both parents. That is why a history on the father's side counts too (Dermato-INFO).
And the hereditary "risk percentage"? There is no single percentage: studies identify regions of the genome and fractions of variance, not a figure that would be passed on as it stands from parent to child. So two precautions. A bald maternal grandfather raises the risk, he does not determine it. And the absence of baldness in your parents does not rule yours out.
Baldness: at what age does it start, and how fast does it progress?
Two French sources give frequencies, and they do not land on exactly the same figures. We quote both of them, line by line, rather than inventing an average.
| Age | Frequency in men | Source |
|---|---|---|
| 20 | about 15% | Dermato-INFO |
| 20 | 20% | VIDAL |
| 30 | 30% | Dermato-INFO and VIDAL |
| 40 | 40% | VIDAL |
| 50 | one man in two | Dermato-INFO |
| Age | Frequency in women | Source |
|---|---|---|
| 40 | about one woman in five | VIDAL |
| 60 | one woman in four | VIDAL |
Two reference points complete this table: in men, androgenetic alopecia can begin as early as puberty in severe forms, but it is more frequent from the age of 40 (Dermato-INFO); in women, it accounts for 80% of lasting hair loss (VIDAL).
On progression, remember three things. It plays out over years, not in a few weeks. It is progressive and worsens with age (Dermato-INFO). And time acts continuously: Norwood's study, published in 1975 and based on 1,000 adult men, insists on this effect of time that carries on even after fifty (Norwood, 1975).
Can baldness stabilise on its own? None of the sources consulted here describes it: the classifications discussed below describe a succession of stages instead. Knowing where your own case stands, and whether the shedding you observe really is baldness, requires an examination of the scalp by a doctor.
The stages and zones of baldness
Over time, baldness is described in stages, and two scales serve as references.
In 1975, Norwood established a classification of male baldness in seven stages: thinning most often starts with the recession of the temples, then gradually reaches the crown, a ring of hair being able to persist on the sides and at the back (Norwood, 1975; Dermato-INFO). The Norwood scale is still used today as a common reference.
For women, Ludwig proposed in 1977 a classification of the stages of the female pattern, centred on the thinning of the top of the scalp, with the front hairline generally preserved; the male type, rarer in women, is classified according to Hamilton or its modification by Ebling & Rook (Ludwig, 1977).
Where does baldness settle? Two zones dominate: the temples and the receding hairline first, then the crown — the vertex. In women, thinning mainly affects the central part of the scalp, generally preserving the frontal edge. One last precision, reassuring when reading your own case: these two patterns are not strictly reserved to one sex. The so-called "male" pattern is sometimes seen in some women, and the reverse too (Dermato-INFO).
To identify your own area precisely, see receding temples and a thinning hairline. And if the question is the very first signs in men, early baldness in men: signs and stages sets them out step by step.
Men and women: two patterns, one mechanism
The underlying mechanism is the same — androgens, genetic predisposition, time — but the visible picture differs clearly between the sexes.
In men, baldness follows a typical pattern: thinning starts at the temples and the receding hairline, then reaches the crown, leaving a ring of hair persisting on the sides and at the back. This is the classic form of male baldness (Dermato-INFO).
In women, the hairline at the front of the forehead is most often preserved, but the hair gradually becomes finer and less dense on top of the scalp, and the parting in the middle tends to widen (Dermato-INFO). The loss is diffuse over the top, and it is never complete: hair persists, thinned (VIDAL). Calling it "less visible" would still be wrong — diffuse thinning can become very visible and hard to live with.
A physiological difference partly explains this lesser severity: in women, an enzyme called aromatase converts part of the testosterone into oestrogens, which reduces the formation of DHT (Dermato-INFO). Other factors can nonetheless favour or worsen female baldness: the menopause, some contraceptives or hormonal treatments, polycystic ovary syndrome, a lack of iron or of vitamin B12. That is why a doctor often looks for them when a woman reports shedding.
Baldness: what can honestly be done?
Three levels stand apart, and confusing them is the first source of disappointment: medical advice, cosmetics, and camouflage. Neither of the last two replaces the first.
The doctor first. The diagnosis of androgenetic alopecia is above all clinical: it rests on observing the scalp, the distribution of the loss and the appearance of the hair. The doctor may add an examination with a dermatoscope, a pull test, sometimes a trichogram, and a targeted blood test — iron, vitamin B12, hormones depending on the context (Dermato-INFO). It is the doctor who decides which examinations are useful, and in what order.
Then come the management options, all of which belong to the doctor: topical minoxidil, offered to men and to women alike; oral finasteride, reserved to men for this indication; hair transplantation; and, more marginally, platelet-rich plasma, whose evidence remains insufficient to be recommended first line (Dermato-INFO). Their effect is conditional: the management has to be continued to maintain it. This guide deliberately gives no dosage, no instructions and no encouragement to ask for a prescription: those decisions are taken in consultation.
On rosemary, often compared with minoxidil, what the science says is summarised in rosemary or minoxidil: what the science says.
Cosmetics next. A serum or a lotion applied to the scalp acts on the surface: it looks after the scalp and the fibre, and makes the daily gesture sustainable. These are not treatments, they do not treat baldness: their place is that of a support, alongside medical management when there is one.
The ORVOVA Roll-On Hair Growth Serum belongs to that category. Its label lists four dosed actives, in black and white:
| Active | Concentration stated on the label | What can be said about it |
|---|---|---|
| Rosemary | 3% | cosmetic active used in scalp care |
| Redensyl | 3% | cosmetic active used in formulas intended for the scalp |
| Aminexil | 2% | cosmetic active used in hair care |
| Anagain | 2% | cosmetic active used in hair care |
This 25 ml roll-on with a massaging ball covers about a month of daily use. It is applied without rinsing, once a day, morning or evening, on a clean or dry scalp, and suits men as well as women, and all hair types. Its formula contains no minoxidil and no hormones; the other ingredients on the label — red clover extract, D-panthenol, moringa extract, tea tree extract, saw palmetto extract — are listed with no claimed effect. According to the brand, the first small hairs show between 6 and 8 weeks, with a complete cycle over 3 months: a landmark, not a promise. Free delivery on orders over €49.
If you are looking for where to start on the care side, all our anti-hair-loss hair care brings our formulas together.
Camouflage, finally. Hair fibres and densifying powders immediately mask a thinning area: that is a real daily relief, provided it is said clearly — it masks, it does not regrow and it slows nothing down. An image supplement, not a treatment.
Frequently asked questions about baldness
Is baldness necessarily hereditary?
No, even if heredity is its main ground. Androgenetic alopecia combines three inseparable factors: androgens, a genetic predisposition and time (Dermato-INFO). Two men carrying comparable genes will therefore not necessarily experience the same baldness at the same age. And the absence of a family history does not rule out having one.
At what age does baldness start?
It can begin at the end of adolescence in severe forms, but it is more frequent from the age of 40 (Dermato-INFO). The published landmarks in men go from about 15 to 20% by the age of 20, 30% by 30 and 40% by 40, then one man in two by 50; in women, about one woman in five around 40 (VIDAL; Dermato-INFO).
Can baldness grow back?
On areas still covered with fine hair, medical management can sometimes improve density (Dermato-INFO). On a smooth area that has been bare for a long time, do not expect it: in non-scarring alopecia the follicles still exist, but deciding what to do is a matter for the doctor, not for a bottle. No cosmetic can promise regrowth.
Baldness or hair loss: what is the difference?
Baldness is androgenetic alopecia: localised on top of the scalp, progressive and lasting. Hair loss, for its part, can be diffuse, rapid and reversible — like the telogen effluvium that follows childbirth, a fever or an emotional shock (Dermato-INFO). In both cases, shedding that is rapid, in patches, or that lasts deserves medical advice.
Can an anti-hair-loss serum replace a treatment?
No. A cosmetic supports a care routine; it does not replace the management of a medical cause. If androgenetic alopecia is diagnosed, the doctor decides what comes next — and no bottle stands in for that decision.
In short: understand your baldness to act at the right time
What to remember:
- baldness is androgenetic alopecia: localised on top of the scalp, progressive and lasting, to be distinguished from diffuse shedding that is often reversible;
- three inseparable factors: androgens, a genetic predisposition and time;
- heredity comes from both parents, with a very real maternal part carried by the X chromosome;
- the frequencies by age exist and are quoted with their source: about 15 to 20% of men by 20, 30% by 30, up to one man in two by 50;
- diagnosis, decisions and follow-up belong to the doctor; a cosmetic supports, it does not treat.
Understanding your baldness means first placing it: which zone, at what pace, with what family history. The question of care comes next. On the cosmetic side, a well-dosed care product can complete a routine you can keep up: that is the role of the ORVOVA Roll-On Hair Growth Serum, with its four dosed actives, to be applied once a day to a clean scalp. And if your shedding is rapid, in patches, or worries you, the first genuinely useful step remains a consultation.
