pillar  11

Sexual and Reproductive
Health.

Why Sexual Health Is a Core Part of Your Health — Not a Separate Subject
Pillar 11 of 12 | Reading Time: 18 minutes
 
 
 
Content last reviewed: January 2026.
Based on peer-reviewed research available at time of publication. Medical science advances continuously. Always consult a qualified healthcare provider for personalised medical advice.

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sexual health is health

Most people were never taught about sexual health properly.
Not in school.
Not at home.
Not by a doctor.
They were given fragments.
Incomplete.
Surrounded by embarrassment.
And the consequences of that silence follow people for years.
Infections they do not know they have.
Symptoms they have accepted as normal when they are not.
Concerns they have never raised with anyone.
Decisions made without enough information.

 

The World Health Organisation defines sexual health as a state of physical, emotional, mental, and social wellbeing in relation to sexuality, which means a person’s relationship with their own body and their intimate relationships.
Not just the absence of disease.
Actual wellbeing.
And the WHO treats sexual health as a fundamental part of overall health.

 

Fundamental means forming a necessary foundation or basis.
Not a separate topic.
Not an awkward add-on.
A core dimension of what it means to be healthy.
This pillar treats it the same way.
Clearly.
Honestly.
Without embarrassment.
Because the people reading this deserve honest information.

a story about two people

 

Picture a man called Daniel.
He is 35.
He has never been tested for sexually transmitted infections, which are infections passed from one person to another through sexual contact.
There is a discomfort he has had for months.
He has told himself it is probably stress.
He has noticed changes in his sexual health over the past year that worry him quietly.
He has not said a word to his doctor.
He does not know how to start that conversation.
He keeps waiting for it to go away on its own.
It is not going away.

 

Now picture a woman called Nina.
She is also 35.
She attends her cervical screening appointments when they come.
Cervical screening is a medical check of the cervix, which is the lower part of the uterus, or womb, where it meets the vagina.
She has been tested for sexually transmitted infections after each new relationship.
She noticed her menstrual cycle, which is her monthly period cycle, becoming irregular two years ago.
She told her doctor.
An underlying hormonal condition, which means a hormonal problem that had been present but not yet diagnosed, was found and treated.
She does not find these conversations easy.
Nobody does.
But she has decided that her health is more important than her discomfort.

 

Daniel and Nina are not fundamentally different people.
But Daniel’s silence is costing him something.
Slowly.
Without him knowing the price.
 

what sexual health actually means

Sexual health covers more than most people realise.
It includes the physical health of the reproductive organs, which are the body parts involved in reproduction, and the systems that support sexual function.

Reproductive means relating to the process of having children.
It includes the ability to prevent pregnancy when that is the choice, and to support fertility, which means the ability to conceive a child, when the time comes.
It includes knowing how infections spread, how to prevent them, and how to get tested and treated.
It includes being able to have sex without pain or significant distress.
And it includes having a positive, informed relationship with your own body and sexuality.
All of these matter.
And all of them are influenced by the same things that influence every other part of your health.
Sleep.
Movement.
Nutrition.
Stress.
Hormones.
They are all connected.

how sexual health connects to the rest of your body

Sexual health and general health are not separate things.
They run through the same systems.

 

Your heart health affects your sexual health:

 

The blood vessels, which are the tubes that carry blood around the body, that supply the heart are the same type of blood vessels that supply the sexual organs.
Think of them as the same network of pipes running through the same building.
When those pipes are healthy, blood flows properly everywhere.
When they are damaged by high blood pressure, which is the force of blood pushing too hard against the blood vessel walls, or high cholesterol, which is a fatty substance that can build up inside blood vessels and narrow them, blood flow is reduced everywhere.
This is why erectile dysfunction in men, which means difficulty achieving or maintaining an erection, is now understood as a significant early warning sign of cardiovascular disease, which means disease of the heart and blood vessels.

 

Research published in the Journal of the American College of Cardiology found that men who experienced erectile dysfunction had significantly higher rates of cardiovascular events, which means heart attacks and strokes, in the years that followed.
Think of it like a warning light on a car dashboard.
The engine is still running.
But something underneath needs attention.

 

Your hormones affect your sexual health:

 

Hormones are chemical messengers the body produces to send instructions from one part of the body to another.
Testosterone, which is a hormone present in both men and women, affects libido, which means sexual desire, and sexual function in both.
Oestrogen, which is a hormone produced mainly in the ovaries in women, affects comfort and lubrication during sex.
Lubrication means the natural moisture that makes sexual activity comfortable.
Thyroid disorders, which are conditions where the thyroid gland in the throat produces too much or too little hormone, reduce libido and affect sexual function in both men and women.
Insulin resistance, which means the body becoming less responsive to the hormone that manages blood sugar, alters sex hormone levels throughout the body.
Sexual health symptoms are very often hormonal symptoms wearing different clothes.

 

Your mental health affects your sexual health:

 

Stress, anxiety, which means persistent feelings of worry and unease, and depression, which means persistent low mood and loss of interest in activities, all reduce libido.
They affect sexual function directly through the nervous system, which is the network of nerves that carries signals throughout the body.
And the relationship works the other way too.
Sexual health difficulties contribute to depression, anxiety, and relationship strain.
They are not separate problems.
They feed each other.

 

Your gut health affects your hormonal balance:

 

The gut microbiome, which is the community of microorganisms, meaning tiny living things, living in the digestive system, plays a role in how oestrogen is processed and circulated in the body.
A disrupted gut microbiome can alter oestrogen levels in ways that affect the menstrual cycle, fertility, and sexual comfort.
This is a reminder of what every pillar in this website demonstrates.
Everything is connected.

what everyone should know about sti

Sexually transmitted infections, which are often shortened to STIs, are infections passed from one person to another through sexual contact.
They are extremely common.
And most people who have them do not know.
This is the most important thing to understand.
No symptoms does not mean no infection.
Most STIs produce no obvious signs in their early stages.
Or ever.
 

Chlamydia:

Chlamydia is a bacterial infection, which means an infection caused by bacteria, a type of single-celled microorganism.
It is the most commonly diagnosed STI in the United Kingdom.
The NHS reports that about 70 per cent of women and 50 per cent of men with chlamydia have no symptoms at all.
Left untreated, which means not given medical treatment, it can cause serious damage to the reproductive system.
In women it can lead to pelvic inflammatory disease, which is an infection of the reproductive organs in the pelvis, the lower part of the abdomen, or belly area.
Pelvic inflammatory disease can make it harder or impossible to conceive, which means become pregnant.
A simple urine test, which means a test on a sample of the person’s urine, or swab test, which means a test using a small cotton bud to collect cells from the affected area, detects chlamydia.
A short course of antibiotics, which are medicines that kill bacteria, treats it.
 

Gonorrhoea:

Gonorrhoea is another bacterial infection.
Many people have no symptoms.
It has become increasingly resistant to some antibiotics in recent years.
Resistant means the bacteria have developed the ability to survive despite the antibiotic.
Left untreated it causes the same problems as untreated chlamydia.
The NHS recommends testing for anyone who has had unprotected sex, which means sexual activity without using a barrier method like a condom, with a new partner.
 

HIV:

HIV stands for human immunodeficiency virus.
A virus is a very small infectious agent that can only replicate, which means reproduce, inside living cells.
HIV is the virus that, without treatment, eventually leads to AIDS.
AIDS stands for acquired immunodeficiency syndrome, which is a condition where the immune system, which is the body’s defence system against illness, has been severely damaged by HIV.
With modern treatment, HIV is a manageable long-term condition.
Manageable means it can be controlled so that a person lives a full, healthy life.
The NHS confirms that people with HIV who are on effective treatment and have an undetectable viral load cannot pass the virus to others.
Viral load means the amount of HIV present in the blood.
Undetectable means so low it cannot be measured.
This is one of the most important medical developments of recent decades.
But it requires testing, diagnosis, and treatment.
Most people with HIV in the early years after infection have no symptoms.
The only way to know is to test.
 

Syphilis:

Syphilis is a bacterial infection that can mimic, which means look like, many other conditions.
It is sometimes called the great imitator because its symptoms can be confused with many other illnesses.
It is rising in many countries.
Left untreated through its stages, it can cause serious damage to the brain, heart, and nervous system, which is the network of nerves connecting the brain and body.
It is treated easily and effectively with antibiotics when caught early.

The bottom line on testing:

Test every year if you are sexually active.
Test with each new partner.
Testing is quick.
It is confidential, which means private and not shared without your permission.
It is often free.
It is one of the most direct acts of care you can offer yourself and the people close to you.
The NHS makes testing available through sexual health clinics, GPs, and home testing kits.

contraception and reproductive choice

Contraception means methods used to prevent pregnancy.
Access to contraception is one of the most important advances in reproductive health in history.
There are many options available.
Each works differently.
Each suits different people in different situations.

Condoms:

 
create a physical barrier between partners.
A barrier is something that physically blocks passage.
They are the only form of contraception that also protects against STIs.
This makes them uniquely valuable.

Hormonal methods:

 
including the contraceptive pill, the patch, which is a small sticky patch worn on the skin, the injection, the implant, which is a small rod inserted under the skin of the arm, and the hormonal coil, which is a small T-shaped device placed inside the uterus, use synthetic, which means artificially made, hormones to prevent pregnancy.
They are highly effective.
But they do not protect against STIs.

Long-acting reversible contraception:

 
which is often shortened to LARC, includes the hormonal coil, the copper coil, which is a non-hormonal T-shaped device placed inside the uterus, and the implant.
These are among the most effective forms of contraception available.
Once in place they work without requiring daily action.

The NHS provides clear, complete guidance on every contraceptive option available.
Choosing contraception is a personal decision.
The best choice depends on your health, your relationship, and what matters most to you.
Speaking to a doctor or sexual health clinic gives you personalised guidance based on your specific situation.

fertility and what affects it

Fertility means the ability to conceive a child.
Most people do not think seriously about fertility until they want to conceive.
By which time the picture may have already changed.
Understanding what affects fertility earlier gives people more options.

Female fertility and age:


A woman is born with all the eggs she will ever have.
An egg is the female reproductive cell that, when fertilised by a sperm, which is the male reproductive cell, can develop into a baby.
The number and quality of those eggs decline with age.
The decline becomes more significant from the mid-thirties onwards.
By the early forties, conceiving naturally is considerably harder for most women.
This is biology.
Not a judgement.
Just information that helps people make informed decisions.

Male fertility and age:


Men produce sperm, which are the male reproductive cells, throughout their lives.
But sperm quality declines gradually from the late thirties onwards.
Older paternal age, which means older age of the father, is linked to slightly higher rates of certain conditions in children.

Lifestyle and fertility:


Smoking reduces fertility in both men and women significantly.
In women it speeds up the decline of egg quality.
In men it reduces sperm count, which means the number of sperm, and quality.
Obesity, which means carrying significantly more body fat than is healthy, disrupts the hormones that govern fertility in both sexes.
Heavy alcohol consumption reduces sperm quality and disrupts ovulation, which is the monthly release of an egg from the ovaries.
Chronic stress keeps cortisol, which is the main stress hormone, high, which suppresses, meaning reduces, the reproductive hormones needed for conception.
All of these factors are modifiable, which means they can be changed.

Stopping smoking, moving toward a healthier weight, reducing alcohol, and managing stress all improve fertility outcomes.

Medical conditions that affect fertility:


Polycystic ovary syndrome, commonly known as PCOS, is a hormonal condition where the ovaries produce higher than normal amounts of androgens, which are male-type hormones.
Polycystic means having many small cysts, which are fluid-filled sacs, on the ovaries.
PCOS is one of the most common causes of fertility difficulties in women.
It is linked to irregular or absent ovulation.

Endometriosis, where tissue similar to the uterine lining, which is the inner layer of the womb, grows in places it should not, is another common cause of fertility difficulties.

Both conditions require medical diagnosis and management.
If you have been trying to conceive for 12 months without success, speak to your doctor.

If you are over 35, speak after six months.
The earlier a concern is investigated, the more options are typically available.

The Human Fertilisation and Embryology Authority provides clear evidence-based information on fertility treatment options.

the menstrual cycle as a health a signal

The menstrual cycle is the monthly cycle of changes that occur in the female body in preparation for the possibility of pregnancy.
It is not just about reproduction.
Think of it like the oil warning light in a car.
When everything is running well, the light stays off.
When something needs attention, the light comes on.
Changes in your cycle are the light coming on.

A regular cycle with manageable periods tells you the underlying hormonal system is broadly working.
A cycle that has become irregular, which means inconsistent or unpredictable, very painful, very heavy, or absent is a signal that something needs attention.Common causes of menstrual changes include PCOS, endometriosis, thyroid problems, significant weight changes, extreme exercise, chronic stress, which means stress that continues for a long time, and the approach of menopause, which is the point at which the monthly cycle ends permanently.
None of these should be ignored or simply endured.

Heavy periods:

 
that soak through protection within an hour, that require double protection, meaning using two types of protection at once, or that significantly affect daily life deserve a medical conversation.

Very painful periods:

 
that are not controlled by standard pain relief, that cause vomiting, or that require time off work or daily activities deserve investigation.

Absent or significantly irregular periods:

 
outside of pregnancy deserve investigation, particularly in women of reproductive age, which means women who have not yet reached menopause.
The NHS provides guidance on when to seek medical advice.
Tracking your cycle on a calendar or an app gives you the information your doctor needs to help you.

common concerns people rarely talk about

Pain during sex:


Pain during sex, which is medically known as dyspareunia, affects both men and women.
Dyspareunia is the medical term for persistent or recurrent pain during sexual activity.

In women it has many possible causes including endometriosis, a condition called vaginismus where the muscles around the vagina, which is the passage leading to the uterus, involuntarily tighten making sex painful, vaginal dryness, which means insufficient natural moisture, and pelvic inflammatory disease.

In men it can be caused by infection or inflammation, which is the body’s response to injury or infection, of the reproductive organs.
Pain during sex should always be investigated.
It is not something to simply accept.
It is a symptom, which means a sign that something is happening in the body that needs attention.
Symptoms deserve attention.

Low desire:


Loss of sexual desire is very common.
It is affected by stress, poor sleep, hormonal changes, relationship difficulties, side effects of medication, and mental health.
It is rarely permanent.
But it is worth raising with a doctor if it persists, which means continues, and is causing distress.

Erectile dysfunction:


Erectile dysfunction means persistent difficulty achieving or maintaining an erection, which is when the penis becomes firm enough for sexual activity.
It affects many men, particularly as they get older.
It can be caused by cardiovascular disease, which means disease of the heart and blood vessels, diabetes, which is a condition affecting blood sugar regulation, hormonal imbalance, anxiety, and side effects of medication.
As mentioned earlier, in younger men it can be an early sign of cardiovascular disease.
It deserves medical attention.
Not silence.
Not acceptance.
Medical attention.
The NHS provides clear information on the full range of causes and treatments.

Effective treatments exist.

how to protect your sexual health every day

Test regularly:


Every year if you are sexually active.
With each new partner.
Testing is quick, confidential, and often free.
Not testing is the only way an infection can go undetected and cause harm.

Use condoms with new partners:


They protect against both pregnancy and STIs at the same time.
No other form of contraception does both.

Know your HIV status:


If you have not been tested for HIV, get tested.
If you have HIV, access treatment.
Modern treatment means the virus can be made undetectable.
An undetectable viral load means no risk of transmission, which means passing the virus to others.

Attend your cervical screening appointments:


Cervical screening does not test for cancer.
It tests for changes in the cells of the cervix that could become cancer years from now.
Treating those changes before they do is prevention at its most direct.

Tell your doctor about symptoms:


Pain during sex.
Changes in libido.
Unusual discharge, which means an unusual fluid coming from the vagina or penis.
Changes in your menstrual pattern.
Difficulties with sexual function.
These are medical symptoms.
They belong in a medical conversation.
Bringing them up sooner always produces better outcomes than bringing them up later.

Protect your overall health:


Because your sexual health runs through the same systems as everything else.
Sleep well.
Move every day.
Eat mostly whole food.
Manage stress.
Do not smoke.
Moderate alcohol.
Every one of these choices directly supports your sexual and reproductive health.

key takeaways

✓ The WHO defines sexual health as a fundamental part of overall health, not a separate subject.

✓ Most STIs, which are infections passed through sexual contact, have no obvious symptoms. The only way to know is to test. The NHS recommends testing annually or with each new partner.

✓ Around 70 per cent of women and 50 per cent of men with chlamydia, a bacterial STI, have no symptoms according to the NHS. Left untreated it can cause infertility.

✓ Erectile dysfunction, which means persistent difficulty achieving or maintaining an erection, in younger men is a significant early warning sign of cardiovascular disease according to research in the Journal of the American College of Cardiology.

✓ People with HIV on effective treatment with an undetectable viral load, meaning a very low level of virus in the blood, cannot pass the virus to others according to the NHS.

✓ The menstrual cycle is a monthly health signal. Significant changes in pattern, pain, or flow warrant medical investigation.

✓ Smoking, excess weight, heavy alcohol, and chronic stress all reduce fertility in both men and women. All are modifiable, meaning they can be changed.

✓ Condoms are the only form of contraception that protects against both pregnancy and STIs simultaneously.
 
✓ Pain during sex, low libido, which means reduced sexual desire, and erectile difficulties are medical symptoms that deserve medical attention, not silence.

frequently asked questions

How often should I get tested for STIs?
The NHS recommends testing every year if you are sexually active, or with each new partner.
Testing is available through sexual health clinics, GPs, and home testing kits.
It is confidential, which means private, and in many cases free.
Long-acting reversible contraception, which includes options like the hormonal implant and the coil, a small device placed inside the uterus, are among the most effective options available.

But they do not protect against STIs.
Condoms are the only option that protects against both pregnancy and STIs.
The best choice depends on your health, your relationship, and your priorities.
Speaking to a doctor or sexual health clinic gives you personalised guidance.
Yes.

In many cases effectively.
Lifestyle changes including stopping smoking, regular exercise, and managing blood pressure, which is the force of blood against the vessel walls, produce real improvement.
Medication is effective for many men.
Psychological support helps when anxiety is a contributing factor.
Speak to your doctor.
The NHS provides clear information on all treatment options.
Yes.

The hormonal changes throughout the cycle affect energy levels, mood, sleep quality, appetite, concentration, and skin throughout the month.
Understanding your cycle helps you work with those changes rather than against them.
Significant disruptions to the cycle are symptoms that deserve a medical conversation.
Female fertility begins declining gradually in the late twenties.
The decline becomes more noticeable from the mid-thirties.

By the early forties, conceiving naturally is considerably harder for most women.
This does not mean conception is impossible.
But it does mean that assumptions about fertility remaining constant indefinitely are not supported by biology.
If you have concerns about fertility, speak to your doctor sooner rather than later.
Go to a sexual health clinic or your GP as soon as possible.

 

Do not wait.
Do not assume it will go away.
Most STIs are treated easily and effectively when caught early.
The longer they are left, the more damage they can cause.
Testing is quick, confidential, and in most cases free.

medical reference

World Health Organisation. (2023). Sexual Health.
 
National Health Service. (2023). Sexually Transmitted Infections (STIs).
 
National Health Service. (2023). Chlamydia.
 
National Health Service. (2023). Gonorrhoea.
 
National Health Service. (2023). HIV and AIDS.
 
National Health Service. (2023). Contraception.
 
National Health Service. (2023). Cervical Screening.
 
National Health Service. (2023). Erection Problems (Erectile Dysfunction).
 
National Health Service. (2023). Period Pain.
Inman BA et al. (2009). A Population-Based, Longitudinal Study of Erectile Dysfunction and Future Coronary Artery Disease. Journal of the American College of Cardiology. 51(3):1101-1107.
 
Human Fertilisation and Embryology Authority. (2023). Treatment Options.
 
Centers for Disease Control and Prevention. (2023). Sexually Transmitted Infections.