Luteinising Hormone (LH)

LH at a glance

What is luteinising hormone (LH)?

Luteinising hormone is a gonadotropic hormone produced and released by the anterior pituitary gland. It has important roles in the sexual health and function of both men and women.

LH works alongside Follicle-Stimulating Hormone (FSH), signalling to the sexual organs (the ovaries or the testes) to start the processes that support your reproductive health:

• In men, LH stimulates the testes to make testosterone, the male sex hormone that’s essential for sperm production.
• In women, LH triggers ovulation and is important during the second half of the menstrual cycle, preparing the body for pregnancy.

Where is luteinising hormone produced?

LH is produced and released by the anterior pituitary gland, the front portion of a pea-sized gland sitting at the base of your brain, just behind the bridge of your nose. But the pituitary doesn’t act alone. The chain starts one step higher, in the hypothalamus, which releases gonadotropin-releasing hormone (GnRH) in pulses. Those pulses tell the pituitary to release LH into the bloodstream. From there, LH travels to its target organs: the ovaries or the testes.

Once it arrives, LH acts on very specific cells:

• In the ovaries: the theca and granulosa cells, which surround the developing egg.
• In the testes: the Leydig cells, which sit between the sperm-producing tubes and make testosterone.

This whole system (hypothalamus, pituitary, gonads) is known as the HPG axis. It’s a loop rather than a one-way street: the sex hormones produced at the bottom signal back up to the brain, adjusting how much LH is released next.

The HPG axis. The solid path is the signal travelling down; the dashed path is the feedback that rises back to the brain. 

What is a serum LH level?

“Serum LH” simply means LH measured in your blood. Serum is the liquid part of blood left after clotting. It isn’t a different hormone, and a serum LH level is the same thing as an LH level.

If you see LH on a blood test report, it’s the concentration of luteinising hormone circulating in your blood at the moment your sample was taken. Forth reports LH in IU/L (international units per litre). Some labs use mIU/mL instead. The two are numerically identical, so an LH of 7.4 IU/L is the same as 7.4 mIU/mL. No conversion needed.

What does luteinising hormone do?

LH’s job depends on where it lands. The hormone is identical in everyone; the difference is the target. In women it drives the monthly release of an egg and then supports the structure left behind. In men it’s a steady, continuous signal to keep testosterone production going. In children, LH stays very low until puberty, when rising pulses of it are one of the triggers that start sexual development.

LH’s role in the menstrual cycle

In menstruating women, LH helps regulate the menstrual cycle. During the first two weeks of the cycle, LH and FSH stimulate the ovarian follicles to produce oestradiol. Once a critical level of oestradiol is reached, LH levels surge around day 14, triggering the release of an egg from the ovary. This is ovulation [1].

After ovulation, LH acts on the corpus luteum, the collection of cells the egg was released from, prompting it to produce more progesterone. Progesterone supports the early stages of pregnancy if fertilisation happens. If it doesn’t, hormone levels fall and the cycle begins again [2].

What does LH stimulate?

Put simply, LH stimulates four things:

• Ovulation: the surge is what releases the mature egg from the follicle.
• Progesterone: via the corpus luteum, in the second half of the cycle.
• Oestradiol: indirectly, by acting on the theca cells that supply the raw material for oestrogen production.
• Testosterone: in men, by acting on the Leydig cells in the testes.

So LH doesn’t produce these hormones itself. It’s a messenger: it tells other tissues to produce them.

LH and your other hormones

LH sits inside a feedback loop, and this is what makes it behave in a way that can look contradictory at first. 

For most of the cycle, oestrogen suppresses LH. As oestradiol rises during the follicular phase, it signals back to the brain to ease off, keeping LH low. This is classic negative feedback. But once oestradiol climbs past a certain threshold and stays there for around 48 hours, the effect flips. The same hormone that was holding LH down now triggers a sharp release of it. This switch to positive feedback is what produces the mid-cycle LH surge and, therefore, ovulation. Progesterone, released after ovulation, then helps shut the surge down again. 

In men the loop is simpler and steadier: testosterone signals back to the brain, and when testosterone falls, LH rises to compensate.

This is also why anything that lowers oestrogen or testosterone tends to raise LH. The brain is pushing harder on a system that isn’t responding.

LH’s role in fertility

Luteinising hormone matters for both male and female fertility:

• Egg development: the mid-cycle LH surge ensures the ovarian follicles mature and that an egg is ready to be released [3].
• Hormone regulation: LH is critical for ovulation in women and for testosterone production in men, which is essential for sperm production.
• Sperm production: in men, LH stimulates the Leydig cells in the testes to make testosterone. In combination with FSH, LH initiates and maintains normal sperm production, known as spermatogenesis [4].

There’s no single “good” LH level for conceiving. What matters is whether the surge is happening at all, and whether it’s happening at a predictable point in the cycle. This is why LH is usually interpreted alongside progesterone, FSH and oestradiol rather than on its own.

LH’s role in perimenopause

During perimenopause, ovarian function declines and hormones fluctuate. LH levels can become erratic across the cycle, contributing to irregular periods and to perimenopausal symptoms.

Persistently high LH is also a sign of reduced ovarian reserve and function, meaning a woman is transitioning towards menopause. Our own data shows this transition clearly (see the section on normal LH levels in women by age below).

LH and FSH: how they work together

LH is almost never interpreted on its own. Its partner hormone, FSH, comes from the same gland and acts on the same organs, and doctors read the two as a pair.

What’s the difference between LH and FSH?

The short version: FSH grows the egg, LH releases it.

What the two together can suggest

• Both raised. The ovaries or testes aren’t responding, so the brain is signalling harder. This is the pattern of menopause, primary ovarian insufficiency, or primary testicular failure.
• Both low. The signal from the brain itself is reduced. Seen with hormonal contraception, very low body weight, heavy training, significant stress, or a pituitary problem.
• LH raised out of proportion to FSH. One of the patterns associated with Polyendocrine Metabolic Ovarian Syndrome (PMOS). An LH:FSH ratio above roughly 2:1 is sometimes mentioned in this context, but it appears in only a minority of women with PMOS and is absent in many. PMOS is diagnosed on a combination of symptoms, ultrasound and several blood results — never on this ratio alone.
• Both normal. Reassuring for your age and stage, though a single test remains a snapshot.

What are normal LH levels?

When judging whether an LH level is normal, several things have to be taken into account:

• Age
• Sex
• Where you are in your menstrual cycle
• Whether you’ve been through menopause
• Whether you’re using hormonal contraception or HRT

Normal ranges also vary between laboratories. The reference ranges used by Forth’s labs are:

Notice that the ranges for women differ depending on menopause status, not age. That distinction turns out to matter enormously, as the data below shows.

Normal LH levels in women by age

Across the Forth test results collected from women, LH is remarkably stable through the reproductive years and then climbs steeply.

Normal LH levels by age in women. Median LH stays between 7.1 and 7.5 IU/L from 18 to 44, then rises almost fivefold across the menopause transition. Bars show the median; the vertical lines show the middle 50% of results. 

Forth customer data, UK. Median with 25th–75th percentile.

Two things stand out. First, LH barely changes between 18 and 44. The median moves only between 7.1 and 7.5 IU/L across 27 years (a difference of less than 6%). If you’re in this age band, your age is not a useful explanation for an unusual LH result.

Second, the spread widens before the average does. At 45–49 the median is still 10.0, only slightly above the reproductive years. But the top of the middle-50% range has jumped from 11.1 to 20.4. In other words, a quarter of women in their late forties already have LH in the post-menopausal range, while half are still entirely typical. The average conceals what is really happening: the group is splitting in two.

That splitting becomes obvious once the same data is separated by menopause status.

The same age brackets split by menopause status. Forth customer data (women aged 45–59 in the UK).

Median LH in IU/L. Forth customer data, UK.

At 50–54, women who are post-menopausal have roughly double the LH of women the same age who are still having periods. Quoting a single average for that age group would describe almost nobody.

There’s a subtler signal here too. Among women aged 50–54 who still consider themselves pre-menopausal, the median LH is 18.3, well above the 7.4 seen at 40–44, and above the top of the pre-menopausal reference range. These are, in all likelihood, women in the middle of the transition. Your stage matters more than your age, and one number without that context tells you very little.

LH levels during the menstrual cycle

For women who are still cycling, where you are in your cycle affects LH more than almost anything else.

LH across the menstrual cycle: the textbook pattern next to real customer results. Forth customer data (women with regular cycles and no hormonal contraception, UK).

Women with regular periods, not using hormonal contraception. Forth customer data, UK.

The surge is clearly visible in real customers, peaking on day 14, but it’s flatter than the classic textbook curve, and that’s expected rather than a problem. Each day in our data is a different group of women, not one woman followed across a month. Since not everyone ovulates on day 14, averaging across them smooths a sharp individual spike into a gentle hill. An individual’s own surge is far more dramatic than any population average can show.

LH levels in perimenopause and menopause

As the ovaries become less responsive, they produce less oestrogen. With less oestrogen signalling back to the brain, the pituitary pushes harder and LH rises. This is why LH is high in menopause, and why it increases with age in women but not in the same way in men.

Forth customer data, UK.

Post-menopausal LH is around four and a half times pre-menopausal levels. But there is an important limit here. People often ask what LH level indicates menopause or perimenopause, hoping for a threshold. There isn’t a reliable one. In perimenopause, LH swings unpredictably from cycle to cycle: it can be menopausal one month and entirely normal the next. This is exactly why NICE guidance advises against using FSH or LH to diagnose menopause in women over 45, where the diagnosis is made on symptoms and menstrual pattern instead. In women under 45, and particularly under 40, hormone testing has more of a role, but it’s still interpreted alongside symptoms rather than on its own.

If you’re trying to understand perimenopause, a single LH reading is one of the least reliable tools available. A test that maps several hormones across the cycle, such as MyFORM® Perimenopause, gives a much better picture than one snapshot.

Does HRT affect LH?

Among post-menopausal women in our data, those taking HRT had noticeably lower LH than those who weren’t, as shown in the table below.

Post-menopausal women. Forth customer data, UK.

HRT supplies oestrogen from outside the body, which restores some of the feedback signal to the brain and eases the pressure on the pituitary. The median falls by around 22%, This is consistent with the expected effect of oestrogen on the hypothalamus and pituitary, although LH can remain above pre-menopausal reference ranges even when HRT is effective. Published research shows the same effect.[^9]

Does that mean HRT should be adjusted until LH or FSH returns to a pre-menopausal level? Not based on current evidence or guidance. Although LH and FSH fall in response to oestrogen, there is no established LH or FSH target for HRT treatment. Unlike TSH in hypothyroidism, these hormones have not been validated as markers for deciding the optimal HRT dose.

Worth knowing if you’re on HRT: UK guidance recommends using the lowest effective HRT dose, with treatment guided mainly by symptom control, side effects and individual circumstances rather than by targeting a particular LH, FSH or oestradiol level. Blood oestradiol testing can sometimes be useful, for example if symptoms persist and poor absorption is suspected. So, if your LH remains above a pre-menopausal reference range while taking HRT, that result alone does not mean your dose is too low.[^11]

LH levels in pregnancy

LH is not a pregnancy test, and this causes a lot of confusion. Once pregnancy is established, LH is suppressed rather than raised. The hormone that rises is hCG (human chorionic gonadotropin), which takes over the job of maintaining the corpus luteum.

The confusion comes from home ovulation tests. LH and hCG are structurally similar enough that an ovulation predictor kit can show a positive result in early pregnancy, because it’s picking up hCG. That’s a cross-reaction, not a high LH level, and an ovulation kit should never be used as a pregnancy test. If you want to know whether LH levels after ovulation mean you’re pregnant, the answer is that an LH blood test can’t tell you. A pregnancy test measuring hCG can.

Normal LH levels in men by age

Across Forth test results from men, LH follows a shallow U-shape rather than the steep climb seen in women:

Forth customer data, UK. Normal range 1.7–8.6 IU/L.

LH dips through the thirties, bottoming out at 4.3 between 35 and 39, then rises steadily from the mid-forties. That later rise is the male equivalent of what happens to women at menopause, only far more gradual: as the testes become less efficient, less testosterone signals back to the brain, and LH increases to compensate.

Around one man in four sits outside the reference range but, unlike women, more often below it than above. Low results peak at 26.4% between 35 and 39, then become less frequent after 40, while raised results roughly double by 60+, reaching 19.6%.

What can cause your LH levels to change?

LH levels naturally fluctuate, particularly during the menstrual cycle, so a high or low result isn’t automatically good or bad. A surge midway through your cycle could simply mean you’re about to ovulate (useful news if you’re planning a pregnancy). That’s why factors like your age, sex and menstruation status have to be considered before interpreting any result.

Why LH levels fluctuate

If you’ve tested twice and got two quite different numbers, that’s usually normal rather than an error. LH is released in pulses, not as a steady stream. The hypothalamus sends GnRH signals every 60 to 90 minutes, and LH follows. A blood test captures a single moment in that rhythm, so two samples taken hours apart can legitimately differ.

On top of that, LH varies:

• Across the cycle: nearly double at ovulation compared with baseline, as our data shows.
• Across the day: pulses are typically larger in the early morning, which is why male hormone testing is usually done before 10am.
• From cycle to cycle: especially during perimenopause, when the pattern can be erratic.

None of this means the test is unreliable. It means a single number is a snapshot, and it needs to be read alongside your symptoms, your cycle day and your stage of life.

Factors that affect LH levels

Common influences on LH levels are:

• Age and menopause status: the biggest single influence in women.
• Cycle day 
• Hormonal contraception
• HRT, which lowers LH in post-menopausal women.
• Body weight
• Energy availability: very low intake or heavy training can suppress LH.
• Stress and sleep: both act on the hypothalamus at the top of the chain.
• Smoking and alcohol: both associated with altered LH.[^8]
• Time of day, because of the pulsatile release described above.

LH and hormonal contraception

Hormonal contraception is one of the most common reasons for an unexpectedly low LH result.

Women. Forth customer data, UK.

The type matters far more than the fact of using contraception at all. Combined methods roughly halve LH: a median of 4.5 against 8.2 in women using nothing, with a quarter of results below 1.3 IU/L. That’s exactly how they work: by suppressing the pituitary signal, they prevent ovulation. Progesterone-only methods barely shift it, at 7.2 against 8.2. Many of these methods don’t reliably suppress ovulation, so the LH signal continues.

If you’re on the combined pill, a low LH result is expected rather than a sign of a problem,  and it also means the test can’t tell you much about your underlying cycle.

LH and body weight

Among women tested on days 2–5 of their cycle and not using contraception, LH is somewhat lower in the higher BMI bands:

Women, early-cycle tests only. Forth customer data, UK.

This may run against expectation, since higher body weight is often associated with PMOS and PMOS with raised LH. The likely explanation goes back to the feedback loop described earlier. Fat tissue produces oestrogen, so a higher body weight tends to mean a slightly higher baseline oestradiol level, and more oestradiol signalling back to the brain means less LH released. Lower LH in the higher BMI bands isn’t an anomaly. It’s the same negative feedback working exactly as it should. It also fits published work showing the classic raised LH pattern in PMOS is seen more often in leaner women.

"Two important caveats. This shows association, not cause: we can't tell from this data whether weight affects LH, whether something else affects both, or whether it reflects who chooses to buy a test. And a lower median across a group says nothing about any individual. If you're concerned about your weight and your hormones, that's a conversation for your GP rather than something to act on from a chart. "

Dr Thom Phillips

High LH levels

High luteinising hormone can be a sign that your sexual organs aren’t producing enough of the hormones needed to regulate reproduction, so the brain increases the signal in response.

In women this happens most often around midlife, as part of the menopause transition, and it produces a figure that looks alarming written down: half of women aged 50 to 54 return an LH result outside the pre-menopausal reference range. That number is worth sitting with for a moment, because it says far more about the range than about the women being measured.

Where women’s LH results sit against the reference range used for their group. The share falling above it climbs steeply through the late forties and peaks between 50 and 54. Forth customer data, women, UK.

The pre-menopausal range was built around women who are still cycling regularly, so applying it to someone in the middle of the transition flags an ordinary physiological shift as though it were a fault. Nothing has gone wrong in those women. The measuring stick simply stops fitting before the biology does, and the proof is what happens next: the apparent improvement after 55 isn’t LH coming back down, it’s the point at which the wider post-menopausal range takes over and the same number is read differently.

If you’re in your late forties or early fifties and your LH has been flagged, that context matters more than the flag itself.

What causes high LH levels?

Most raised results in women trace back to one of these:

• Menopause and perimenopause: declining ovarian function is by far the most common cause in women over 45.
• PMOS: a common condition affecting how the ovaries work, causing irregular periods, raised male hormones and cysts on the ovaries. Hormonal imbalances are common in PMOS, including high testosterone, high LH and high prolactin, alongside low sex hormone-binding globulin (SHBG) [6]
• Primary ovarian insufficiency: when the ovaries stop working normally before 40.
• Turner syndrome: it affects females and is caused by the full or partial deletion of an X chromosome. It impairs ovarian function, and LH rises as the body tries to stimulate the ovaries to work [5]
• Pituitary tumours, which are an uncommon cause.

In men, raised LH usually means the testes are underperforming while the brain signals normally. Causes include:

• Klinefelter syndrome, caused by an extra X chromosome, which leads to small testes that don’t make enough testosterone to support sperm production; 
• primary testicular failure from injury, infection such as mumps orchitis, chemotherapy or radiotherapy; 
• and undescended testes. 

Symptoms of high LH levels

High LH levels do not usually cause symptoms directly. Instead, symptoms tend to be related to the underlying cause of the hormonal imbalance. 

In women they may include:

• irregular, or absent periods;
• difficulty conceiving;
• hot flushes, night sweats and vaginal dryness if the cause is menopause;
• acne, excess facial or body hair and scalp hair thinning if the cause is PMOS.

In men, the symptoms are the same as low testosterone: low libido, fatigue, reduced muscle mass, erectile difficulties and low mood.

How to lower LH levels

If your LH is raised and it’s causing symptoms or affecting your quality of life, speak to your doctor for advice and treatment. Alongside that, some things may help.

How to lower LH levels naturally

Three things have reasonable evidence behind them:

• Quit smoking: some research shows smokers tend to have higher LH around the time of their period compared with non-smokers, which may affect fertility and reproductive health.[^8] If you’re trying to conceive and you smoke, stopping is recommended.
• Reduce alcohol: some evidence suggests regular alcohol consumption can raise LH; cutting down may help normalise levels.
• Support your general reproductive health: a balanced diet with plenty of fruit, vegetables and wholegrains; lean rather than processed meat; regular activity aiming for around 150 minutes a week; and good quality sleep, which helps regulate hormone release.

Medical treatment for high LH levels

Treatment targets the cause, not the number itself.

• In menopause, HRT can reduce LH as well as easing symptoms, an effect visible in our own data above, and supported by published research.[^9]
• In PMOS, treatment is directed at symptoms and at insulin regulation, which can in turn affect the LH pattern.
• In men with primary testicular failure, treatment focuses on testosterone rather than on lowering LH.

There is no medication whose purpose is simply to reduce an LH number, and there’s rarely a reason to want one. Raised LH is a signal about what’s happening underneath, so the useful question is why it’s raised, not how to suppress the messenger.

Low LH levels

Low LH usually means the opposite problem: the pituitary or the hypothalamus isn’t sending enough signal in the first place. Doctors call this a central or hypogonadotropic pattern.

Low results are considerably more common in men than in women in our data: around one man in six overall, rising to more than one in four between 35 and 39.

How LH results fall into each category in men. Low results peak at 26.4% between 35 and 39, then become less frequent with age, while raised results roughly double by 60+. Forth customer data, UK.

What causes low LH levels?

The usual explanations, which differ between women and men:

• Hormonal contraception (in women), particularly combined methods (the most common explanation in women of reproductive age, as our data shows).
• Functional hypothalamic amenorrhoea (in women): an absence of periods often caused by psychological stress, heavy exercise or weight loss. It reduces GnRH production, and LH falls with it.[^7]
• Relative energy deficiency in sport (RED-S): an imbalance between energy intake and energy expenditure, which affects both men and women.[^10]
• Kallmann syndrome: an inherited condition in which the hypothalamus doesn’t release GnRH, causing low LH and FSH.
• Pituitary problems, including tumours, injury or previous surgery.
• High prolactin, which suppresses GnRH.
• Some medications, including opioids, and corticosteroids.
• Anabolic steroid use, current or previous, which suppresses the body’s own LH production. This is a common explanation in men.
• Obesity, particularly in men.

Symptoms of low LH levels

As with high LH levels, low levels of luteinising hormone (LH) do not cause symptoms directly. Instead, they present through the signs of the associated hormonal imbalances. In women, this may lead to irregular or absent periods, lack of ovulation and difficulty conceiving. In men, it may cause reduced libido, erectile difficulties, fatigue, loss of strength and reduced muscle mass.

What points to low rather than high LH is usually the context, not the symptoms:

How to increase LH levels naturally

Some lifestyle factors influence LH. The clearest is energy availability. RED-S is caused by an imbalance between energy intake and energy expenditure: for example, low calorie intake combined with a high level of exercise, so that the body isn’t adequately fuelled for the activity it’s doing.

RED-S can affect men and women, causing hormone imbalances including low LH, a range of symptoms, and in some cases infertility.[^10] Where this is the cause, restoring adequate fueling and reviewing training load is what allows LH to recover.

This is a signal to seek help rather than a problem to self-manage. Absent periods, persistent fatigue or a sharp fall in performance alongside a low LH result should be discussed with a GP or sports physician, not addressed by adjusting diet or training alone. Alongside that, addressing sleep, chronic stress, and alcohol intake supports the whole system.

Treatment for low LH levels

Treatment depends on the cause. Where a pituitary problem or a condition like Kallmann syndrome is responsible, hormone treatment can be very effective, including gonadotropin therapy to stimulate ovulation in women or restore testosterone and fertility in men. This is specialist territory, prescribed and monitored by an endocrinologist or fertility specialist.

Treatment for low LH levels in males specifically often involves distinguishing a central cause from a testicular one, which is why LH is nearly always tested alongside testosterone and FSH.

Luteinising hormone blood test

What is an LH test and what does it measure?

An LH blood test measures the concentration of luteinising hormone circulating in your blood, reported in IU/L. It’s a simple, direct measurement with no calculation involved.

An LH test is usually requested by a doctor when a couple is finding it difficult to conceive. It’s traditionally measured from a blood sample taken from a vein in the arm, though you can also test your LH levels at home with a finger-prick sample.

What the test doesn’t do is diagnose anything on its own. It tells you the strength of the signal being sent from your brain to your ovaries or testes at one moment. Interpreting that requires knowing your sex, age, cycle day, menopause status and what medication you’re taking.

Why you might need an LH test

Measuring your LH levels at a specific moment in time can help you understand:

• Whether a pituitary gland or hypothalamic disorder is causing hormone fluctuations
• What might be causing fertility problems
• Why you might be experiencing irregular or absent periods
• Whether you are transitioning through menopause
• Why you might have low testosterone levels
• Whether a pattern consistent with PMOS is present, alongside other markers

When to take an LH test

Timing changes the result more than almost anything else.

• If you have regular periods: test on days 2–5 of your cycle, counting day 1 as the first day of full flow. This is the standard baseline window and the one clinical reference ranges are built around.
• If you’re tracking ovulation: timing depends on your cycle length, and a single blood test is a poor tool for this. Home ovulation kits or a multi-day mapping test are better suited.
• If your periods are irregular or absent: test at any point, but tell whoever interprets it, since the reference range assumes a baseline sample.
• If you’re on hormonal contraception: be aware your result reflects the contraception more than your underlying cycle.
• If you’re male: test in the morning, ideally before 10am, when hormone levels are most consistent.
• If you’re post-menopausal: timing doesn’t matter, as there’s no cycle to account for.

How to prepare and what happens during the test

No fasting is needed for LH. Take the sample at the right point in your cycle and, for men, in the morning. If you’re using a home finger-prick kit, being well hydrated and warming your hands first makes collection much easier (see our guide to collecting a finger-prick sample).

Tell whoever is interpreting the result about hormonal contraception, HRT, fertility medication, steroids or any recent hormone treatment, since all of these change what the number means. Risks are minimal: a blood test may cause brief discomfort or slight bruising.

How to read your LH test results

Your result will appear with three pieces of information: the value, the unit, and the reference range for your group.

• The unit is IU/L (international units per litre). Some labs report mIU/mL. These are numerically the same, so no conversion is needed.
• The reference range depends on your group, not just your sex. Forth uses 2.4–12.6 IU/L for pre-menopausal women, 7.7–59 IU/L for post-menopausal women, and 1.7–8.6 IU/L for men.
• A result outside the range isn’t automatically a problem. As our data shows, around one man in four sits outside the male range, and half of women aged 50–54 have a raised result, usually for entirely expected reasons.
• Where you sit within the range matters as much as whether you’re inside it, particularly if you’re testing repeatedly over time.

"If your result is unexpected, or you have symptoms alongside it, take it to your GP. A single hormone value read without clinical context is one of the easiest things to misinterpret."

Dr Thom Phillips

Test your LH levels with Forth

All these tests include luteinising hormone. Select the one that suits your needs.

• Female Hormone Imbalance Test 
• MyFORM® Hormone Mapping Blood Test 
• MyFORM® Perimenopause Test 
• Female Fertility Blood Test
• Polycystic Ovary Syndrome (PMOS) Blood Test
• Menopause Health Blood Test
• Male Hormones Blood Test
• Advanced Health Check
• Ultimate Health Check

Because LH is best read alongside FSH, oestradiol, progesterone and testosterone, the panel tests give a more complete picture than LH on its own.

FAQs about LH