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I still hate the term “late bloomer”….

Even at the ripe old age of 46 I still hate the term “late bloomer”.

I was stuck with this tag as a teenager. I had to watch my friends and class mates develop into young adults while I was being left behind both physically and emotionally.

Up to the age of 13 I was a fairly normal boy I thought. Not very good at sports, reasonably ok academically, did all the usual things kids did at that age.

Then it all changed, slowly at first, but it did become increasingly apparent I was being left behind. Part of this was my fault as I did not feel the same as everybody else as I had not started puberty. I was invited to the normal teenage parties at first but I kept making excuses about not wanting to go as I felt so much different than everybody else. Eventually the invites stopped coming. I was being left behind both physically and emotionally.

At first I thought, fair enough we all start at different ages, but once you got to 17 or 18 and still had not started puberty it was obvious something was not quite right. I was sent to the doctor by the school nurse but the doctor just dismissed me as a “late bloomer” and told to wait and see.

Even as a 19 year old at University I was being told I was still a “late bloomer”

It was not until I started my first real job after University at the Royal Free Hospital in London that I eventually found out what was wrong with me.

I went to see one of the endocrinologists there. I did not have an appointment, I just went to his office. The first question he asked was “did I have a sense of smell”.

23 years of age and no doctor had ever asked that question before. I said I had never been able to smell. This lead to the diagnosis of Kallmann syndrome.

Mindset Project Podcast – Kallmann syndrome.

Jason Russell is a young Kallmann syndrome patient from Australia. He recently had an interview recorded for a podcast where he talked about his early struggles with the condition and how those experiences have motivated him in his professional work.

Jason is open about his Kallmann syndrome and enjoys the chance to talk to fellow patients. His work not just as a physical trainer but as a motivational and development coach can help fellow patients in their own development. His positive attitude comes through in his work and conversations he has with other patients.




Patient information notes translated into 21 different languages.

Dr Andrew Dwyer is a specialist clinical nurse and research specialist in Kallmann syndrome / CHH based at the CHUV (Lausanne University Hospital in Switzerland). Part of his work was heading a consortium of KS / CHH clinicians and researchers throughout Europe. This has lead to a number of different research projects being funded.

One such project was the development of a comprehensive set of consensus guidelines for the treatment and diagnosis of Kallmann syndrome and CHH which is a useful source of information for both patients and clinicians alike.

Another project was the development of patient information sheets that gave a concise but comprehensive overview of the condition so new patients could learn more about their condition and help to explain the condition to other people.

What makes these information sheets more special is that they were created with input from clinicians, researchers and patient advocates which hopefully has enabled them to contain the information that is relevant to patients while still covering as much of the relevant information as possible.

Once the English language version of the information had been finalised the next step was to produce translations into different languages. The translations were carried out by Kallmann syndrome experts within that country. The name of the person translating each version is listed so patients can contact a Kallmann syndrome expert in their own country.

These information sheets are freely available for anybody to share. They will also be available soon on the GnRH deficiency website. It is hoped that this will be the start of a series of patient led information sources that can help patients access information and interact with other patients and ask experienced Kallmann syndrome clinical specialists questions.





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Patient Information sheets on Kallmann syndrome and Hypogonadotropic Hypogonadism

Produced in conjunction with KS clinicians and researchers from Europe and edited by Dr Andrew Dwyer of CHUV, University Hospital in Lausanne, Switzerland.

A brief but comprehensive overview of KS and CHH (or GnRH deficiency as both conditions could be called). These can provide information for patients themselves and to help to explain the condition to family and friends.

Patient information sheets on Kallmann syndrome and Congenital Hypogonadotropic Hypogonadism

If patients wish to know more information about their condition or want to pass on information to their own doctors a set of consensus guidelines on treatment and diagnosis have been published:

Consensus guidelines on diagnosis and treatment of Kallmann syndrome and Congenital Hypogonadotropic Hypogonadism.

On line clinical study by National Institutes for Health, Maryland, USA.

On line clinical study from National Institutes for Health, Maryland, USA.

There is a specialist clinic at the NIH in Maryland that investigates disorders of puberty. They are always interested to hear from Kallmann syndrome and CHH patients from anywhere in the world. Sometimes they will invite patients to their clinic to participate in clinical studies.

They also running an on line clinical study by means of telephone conversations and an on line questionnaire. They wish to learn more about the experiences of living with Kallmann syndrome / CHH and how the disorder affects patients’ lives.

They will pay compensation for your time, the study is open to anybody, not just those in the US. This clinic is a good source of information for people with Kallmann syndrome and CHH.


Contact details and more information

How is not going through puberty linked to not having a sense of smell ?

I was diagnosed at the age of 23 with Kallmann syndrome. Up to that point I was always dismissed as a “late starter” or “late bloomer” when I asked why I has not started puberty yet.

When I saw the endocrinologist at the Royal Free Hospital in London UK, one of the first questions he asked was “could I smell”. He was the first doctor ever to ask me this question. I knew I could not smell but can not remember ever thinking about it much and never for a moment linking it to my lack of puberty. In all my previous appointments with doctors I never bothered to mention it either.

So what does link not being able to smell and not starting puberty ?

It is a fascinating story I think.

It all starts very early in the development of the foetus, between the 10th and 14th week of foetal development. The key is the movement of nerve cells or neurones. As the foetal brain develops there is a lot of movement as cells and tissues come together to form organs.

The sense of the smell comes from olfactory nerve cells and they have to form a structure called the olfactory bulb in order to work correctly and produce the sense of smell. Puberty and reproductive function relies on nerve cells that release a hormone called GnRH which should be located within the hypothalamus deep within the brain.

It so happens that during early development the olfactory nerves and GnRH releasing neurones originate in the same place and have to travel along the same pathway to their final destination; the olfactory bulb and the hypothalamus respectively.

In Kallmann syndrome the movement of these neurones is blocked, either because the pathway they are supposed to move through has not formed correctly or the proteins that are supposed to help them move are missing.

This means the olfactory nerves and GnRH releasing neurones are left stranded in their starting position. The olfactory nerves can not form the olfactory bulb so there is no sense of smell and the GnRH releasing neurones do no reach the hypothalamus so puberty and the reproductive cycle can not start.

The distances involved in this migration are so small, less than the width of a pin head, but the end result can be quite dramatic.


Diagram showing the migration of GnRH releasing neurones during early brain development & the location of the actions of the genes associated with KS / HH.

Diagram showing the migration of GnRH releasing neurones during early brain development & the location of the actions of the genes associated with KS / HH.

Information on Kallmann syndrome – Delayed or absent puberty.

I do not hide the fact I have a condition called Kallmann syndrome and am always keen to talk about it to anybody who is interested. It can be an embarrassing condition to talk about but I feel that I am in the position that I can talk about it freely and openly.

My major concern is the early diagnosis and treatment of the condition. I was late diagnosed at 23 which has affected my life in certain ways. However early diagnosis and treatment can make so much difference with this disorder. Unlike other rare conditions there is no pain associated with the condition and no loss of life expectancy. The treatment for the condition is fairly straightforward, apart from the fertility treatments which do raise problems.

Those patients I talk to who seem to handle the condition best are those who were diagnosed early and were treated early. More importantly they received information on the condition. I can not prove this through a scientific study but only through personal experience and from talking and meeting with many other fellow patients. The earlier the diagnosis and treatment is, the easier it is to cope with the condition. The isolation of thinking you are the only person not going through puberty and being labelled as a “late starter” or “late bloomer” well into in the late teenage years and beyond can be a difficult thing to overcome.

This has led me to be very vocal about the condition and to mention it in as many social media outlets and websites as I can.

I enjoy the interaction I have with fellow patients and always enjoy meeting and talking with them.

My overall aim is to get the condition mentioned in some form of mainstream media or social network platform. The condition is most certainly under diagnosed (especially in women) and I want to try to help people get an early diagnosis and treatment.

I have created a Facebook information page:

Kallmann syndrome on Facebook

Thank you for reading.