If your ovulation-test line has stayed faint for days, or a blood test has shown a low luteinising hormone result, it is easy to wonder whether you need to raise LH before you can ovulate. The useful answer is more specific: first work out whether LH is actually low, because a home ovulation test and a serum LH blood test are not measuring the same thing in the same way.
No specific food, herb or over-the-counter supplement is established in clinical guidance as a treatment for low LH or anovulation. When LH is genuinely low, treatment is directed at the reason the hormone pattern has changed. For some people that means restoring normal reproductive signalling after low energy availability or excessive training. For others, it means investigating another hormonal cause or using monitored fertility treatment.
So rather than trying to make one number or one test line higher, the aim is to understand what the LH pattern means for your cycle and whether ovulation is actually being affected.
Quick Answers About Increasing Luteinising Hormone
Can you increase LH naturally?
Sometimes normal LH signalling can recover when a reversible cause is corrected. This is most relevant when inadequate energy intake, excessive exercise or significant stress is suppressing the reproductive hormone pathway. There is no universal natural LH booster that suits every cause.
Does a faint or negative ovulation test mean low LH?
No. A home ovulation test measures LH in urine against the test’s positive threshold. A surge may be later than expected, brief, missed between tests or affected by urine concentration. A faint or negative result cannot diagnose low serum LH.
How is low LH treated?
Treatment depends on the cause. It may involve improving energy availability, investigating thyroid or prolactin problems, reviewing medicines, assessing hypothalamic or pituitary signalling, or using monitored fertility treatment when clinically appropriate.
What Does Luteinising Hormone Do?
Luteinising hormone is released by the pituitary gland and works with FSH and ovarian hormones throughout the menstrual cycle. As a follicle develops, rising oestrogen contributes to the hormonal feedback that leads to the mid-cycle LH surge. That surge helps trigger the final processes leading to ovulation.
LH makes more sense as part of the cycle than as a stand-alone fertility score because FSH, LH, oestrogen and progesterone change together across the menstrual cycle. The timing of a blood test therefore matters when the result is being interpreted.
Once ovulation has happened, the next question is no longer how high the LH line becomes. If you want to understand the post-ovulation part of the cycle, luteal phase length is calculated from the estimated ovulation day to the next period. Keeping those questions separate helps avoid treating an LH result as though it explains the whole cycle.
Does a Faint Ovulation Test Mean Your LH Is Low?
A faint OPK line does not tell you that your blood LH is low. Home ovulation tests look for LH in urine and apply the positive rule built into that particular device. A pathology test measures LH in serum and is interpreted against the laboratory’s own reference interval, cycle stage and clinical reason for testing.
This distinction matters because LH is released in pulses. The Royal College of Pathologists of Australasia notes that a single serum result can be misleading, while reference intervals also depend on the assay, age and stage of the menstrual cycle. There is therefore no reliable way to convert the darkness of an OPK line into a blood LH value.
If well-timed home tests repeatedly never become clearly positive, it is more useful to consider whether the surge was missed, ovulation happened later than expected or the cycle may not have ovulated. Repeated negative ovulation tests or no obvious LH surge need to be interpreted as a cycle pattern rather than turning one negative strip into a hormone diagnosis.
Can You Actually Increase Luteinising Hormone?
LH can change when the condition affecting reproductive signalling changes. That does not mean everyone trying to conceive should aim for a higher LH level.
If low LH is part of functional hypothalamic suppression, for example, improving the underlying energy balance and reducing contributing stressors can allow normal hormone signalling to recover. If the pattern is caused by high prolactin, thyroid disease, a medicine or another endocrine problem, the treatment is different again.
The goal is therefore not to find the highest possible LH result. It is to decide whether the result is appropriate for that point in the cycle, whether ovulation is occurring and whether anything in the wider hormone pattern needs treatment.
Why Might LH Be Low?
Low energy availability and functional hypothalamic amenorrhoea
Functional hypothalamic amenorrhoea can develop when the brain reduces reproductive hormone signalling in response to factors such as inadequate energy availability, disordered eating, excessive exercise or significant psychological stress. More than one factor may be present at the same time.
In this situation, the useful target is the underlying energy and stress balance rather than an individual nutrient. Management may involve more adequate nutrition, reducing an excessive training load where relevant, and support for disordered eating or significant psychological stress. Recent reviews also show why rigid calorie or body-fat thresholds should not be applied to everyone: the amount of change needed and the time to menstrual recovery vary between people.
Prolactin, breastfeeding and other hormone changes
Prolactin is another part of the picture. High prolactin can interfere with ovulation and menstrual regularity. During frequent breastfeeding, prolactin rises as part of normal physiology and can temporarily suppress the hormones that trigger ovulation, so a different cycle pattern after birth does not automatically mean something needs to be “boosted”.
Hypothalamic, pituitary and medicine-related causes
Less commonly, low LH can form part of a hypothalamic or pituitary hormone disorder. Hormonal contraception, fertility medicines and some other medicines can also change the pattern or alter how a blood result should be interpreted. This is why a clinician usually looks at cycle history, symptoms and other hormone results rather than diagnosing a cause from LH alone.
What Can Low LH Look Like in Women?
There is no symptom that proves a woman has low LH. The concern usually starts with the wider cycle pattern, such as periods becoming very irregular or stopping, evidence that ovulation is not happening regularly, difficulty conceiving, or a blood result that is outside the laboratory’s expected range.
Changes in eating, weight or exercise can add useful context. So can unexpected breast-milk production when you are not breastfeeding, thyroid symptoms or other endocrine changes. These clues help decide what to investigate; they do not diagnose low LH by themselves.
Higher LH Is Not Automatically Better
Trying to raise LH without understanding the overall pattern can move the focus in the wrong direction. Higher LH can occur in some ovarian or endocrine patterns, while lower LH can occur when hypothalamic or pituitary signalling is reduced. The direction of the change matters because the causes and treatments are not the same.
PMOS, the condition previously called PCOS, is a useful example. Current diagnostic guidance looks at ovulatory dysfunction, androgen-related features and ovarian morphology or AMH where appropriate; an LH result alone does not diagnose PMOS. If irregular periods occur alongside acne, increased facial or body hair or other relevant symptoms, the wider PMOS symptom pattern is more useful than trying to correct LH on its own.
When PMOS is already known or suspected, the challenge may be interpreting an irregular hormone pattern rather than increasing LH. Ovulation tracking with PMOS can require a wider testing window and more context than one OPK line.
What Foods Increase Luteinising Hormone?
There is no specific food established as a treatment for low LH. A balanced preconception diet still matters for general health, but that is different from saying that one food can trigger an LH surge or correct an ovulation disorder.
Zinc, vitamin D, magnesium, dietary fats and other nutrients are often discussed online in relation to hormone production. Correcting a genuine deficiency can be appropriate, but taking extra amounts is not the same as treating the cause of low LH.
The important exception is overall energy availability when under-fuelling is contributing to functional hypothalamic suppression. In that setting, adequate nutrition is part of addressing the cause. It does not mean that everyone with a faint OPK needs to eat more, gain weight or change exercise.
Do LH Supplements Work?
There is no over-the-counter supplement recommended as a universal treatment for low LH in women trying to conceive. Australian preconception guidance also notes that there is not enough research to know whether complementary and alternative medicines improve fertility.
This is worth keeping separate from prescribed fertility medicine. Lutropin alfa is recombinant human LH, and Australian medicine information lists its use with recombinant FSH for women with severe LH and FSH deficiency. That is a specific diagnosis managed with fertility supervision, not evidence that a retail “LH support” product is needed after a faint home test.
If you are trying to conceive and already use herbs, vitamins or other complementary products, take the full list to your GP or pharmacist. That gives them the chance to check whether anything is unnecessary, duplicated or unsuitable alongside other medicines or fertility treatment.
How Is Low LH Investigated in Australia?
An Australian GP will usually start with the reason the question arose. They may ask about cycle length, missed periods, how ovulation has been estimated, recent nutrition or exercise changes, breastfeeding, medicines, contraception and any symptoms that suggest thyroid, prolactin, androgen or other hormonal changes.
Depending on that history, blood tests may include LH, FSH, oestradiol, prolactin and thyroid-stimulating hormone, with other tests added only when the clinical picture calls for them. Pregnancy is also excluded when relevant. Ultrasound may be useful in selected situations, but not everyone with a faint OPK needs a full fertility work-up.
LH is then read as one part of the pattern. Low LH with other signs of reduced hypothalamic-pituitary signalling means something different from elevated gonadotrophins suggesting an ovarian cause. If the separate question is whether ovulation occurred, appropriately timed progesterone testing or clinical monitoring may be more informative than repeating LH alone.
How Is Low LH Treated?
There is no one treatment for “low LH” because the same laboratory finding can arise for different reasons. When functional hypothalamic suppression is involved, treatment focuses on adequate energy availability, nutrition, exercise balance and any eating or psychological factors contributing to the problem.
When prolactin, thyroid or another endocrine condition is involved, treatment targets that diagnosis. Medicine-related hormone changes are reviewed in the context of the medicine itself. In selected ovulation disorders, fertility treatment may be used to support follicle development or ovulation under monitoring.
For severe LH and FSH deficiency, specialist treatment can include recombinant LH with FSH. That is a narrow prescription indication and should not be confused with supplements marketed for general “hormone support”.
Using Ovulation Tests Without Turning Them Into an LH Diagnosis
For home trying-to-conceive tracking, an ovulation test is most useful when you give it one job: detecting the rise in urinary LH that helps show when ovulation may be approaching. Australian guidance commonly uses about 24 to 36 hours after a positive urinary LH test as a practical guide, while research shows that real timing varies between cycles and people.
If you test across several days to catch a short or later surge, ovulation test strips suit repeated dip-and-read testing and make it easier to compare a sequence of results using the same format.
If you prefer direct-use testing without a collection cup, midstream ovulation tests provide another way to detect the urinary LH rise. Whichever format you use, follow the instructions for that exact test rather than applying one product’s timing or reading rule to another. A darker line is not a fertility score, and comparing line darkness between different test types does not tell you whether your blood LH is “better”.
Once you have a clear positive result, there is usually no benefit in trying to make the line darker. The practical next question becomes fertile-window timing, and timing sex after an LH surge is more useful than continuing to chase a higher result.
When Should You See a GP About LH in Australia?
It is reasonable to book a GP appointment when periods have become very irregular or stopped, appropriately timed OPKs repeatedly do not show a clear rise, a pathology result has been flagged as abnormal, or you are concerned that ovulation is not happening regularly. A substantial change in eating, weight or exercise, unexpected milk production outside breastfeeding, or other new hormone-related symptoms are also useful reasons to discuss the wider pattern.
If you are under 35 and have been trying to conceive for a year without success, see your doctor. If you or your partner are over 35, you may want to see your doctor after six months. Earlier assessment makes sense when there is already a known fertility concern or very irregular or absent periods.
A GP can organise the first-line assessment and decide whether anything needs to be repeated, monitored or treated. When the pattern remains unclear or another fertility factor needs investigation, fertility specialist assessment in Australia may become part of the next step.
Frequently Asked Questions about Increasing Luteinising Hormone in Australia
How can I increase LH levels naturally?
There is no universal natural LH booster. If low LH is part of functional hypothalamic suppression, improving energy availability, reducing an excessive training load where relevant and addressing nutritional or psychological contributors may help normal reproductive signalling recover. Other causes need different treatment.
What foods increase luteinising hormone?
No particular food is established as a treatment for low LH. A varied, adequate diet supports preconception health, and genuine nutritional deficiencies may need correction, but one food or nutrient should not be expected to trigger ovulation or correct every low-LH pattern.
What supplements increase LH levels?
No over-the-counter supplement is recommended as a universal treatment for low LH in women trying to conceive. Prescription recombinant LH exists for selected severe LH and FSH deficiency, but that is medically supervised fertility treatment rather than a retail supplement.
What causes low LH levels in females?
Possible causes include functional hypothalamic suppression, hypothalamic or pituitary disorders, high prolactin and some medicine or hormonal treatment contexts. Breastfeeding can also temporarily suppress the reproductive hormones involved in ovulation. The wider hormone and cycle pattern is needed to work out what a low result means.
What are the symptoms of low LH in females?
Low LH has no unique symptom that confirms the diagnosis. Irregular or absent periods, evidence that ovulation is not occurring regularly and difficulty conceiving can prompt investigation, but all of these have several possible causes.
What LH level is needed to trigger ovulation?
There is no single serum LH number that applies to every person or every home test. Laboratory ranges vary with the assay and cycle stage, LH is released in pulses, and OPKs use their own device thresholds. A positive OPK is therefore most useful as a timing signal rather than a target blood concentration.
Next Steps in Australia
If you came to this page because an ovulation-test line stayed faint, you do not need to turn that line into a diagnosis. Use the test to look for a urinary LH rise across the fertile part of the cycle, and keep the dates if the pattern becomes difficult to interpret.
If the same pattern repeats across well-timed cycles, your periods are irregular or absent, or a blood result has been flagged, take the cycle dates, test history and medicine or supplement list to your GP. The most useful next step is to work out whether ovulation is actually being affected and what, if anything, is causing the hormone pattern to look different.
Last reviewed: 17 August 2026
Next scheduled review: August 2027
References
Fertility2Family articles are researched using Australian Government health guidance, professional clinical recommendations and peer-reviewed medical literature. The references below were used to research and fact-check this article and provide additional reading for readers who want to explore the evidence in more detail.
Royal College of Pathologists of Australasia Luteinising hormone
Australasian pathology guidance on LH physiology, pulsatile secretion, cycle-dependent interpretation and the use of LH in infertility and hypothalamic, pituitary or gonadal assessment. Last reviewed January 2024.
Pregnancy, Birth and Baby / Healthdirect Australia Fertility tests and treatments
Australian consumer guidance on female fertility assessment, ovulation problems, LH, prolactin and thyroid testing, and cause-directed fertility treatment.
Pregnancy, Birth and Baby / Healthdirect Australia Ovulation and fertility
Australian guidance on urinary LH testing, fertile-window timing, progesterone testing and when to seek medical advice while trying to conceive.
Healthdirect Australia Irregular periods
Australian guidance on menstrual-cycle variation, fertility implications, common causes and GP assessment.
Monash University PMOS Guideline and Resources
Current Australian-led evidence-based guideline hub for polyendocrine metabolic ovarian syndrome, the condition previously known as PCOS.
Teede HJ, Tay CT, Laven J, et al Recommendations From the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome
Evidence-based diagnostic and management recommendations underpinning current PMOS care, including ovulatory dysfunction, androgen assessment and exclusion of alternative causes.
American Society for Reproductive Medicine Current evaluation of amenorrhea: a committee opinion
2024 clinical guidance on the investigation of absent periods, including hypothalamic, pituitary, ovarian, thyroid and prolactin-related causes.
Saadedine M, Kapoor E, Shufelt C Functional Hypothalamic Amenorrhea: Recognition and Management of a Challenging Diagnosis
Mayo Clinic Proceedings, 2023. Review of hypothalamic hormone suppression associated with psychological stress, disordered eating and excessive exercise and its cause-directed management.
Dobranowska K, Plińska S, Dobosz A Dietary and Lifestyle Management of Functional Hypothalamic Amenorrhea: A Comprehensive Review
Nutrients, 2024. Review of energy availability, nutrition, exercise and lifestyle management in functional hypothalamic amenorrhoea.
Amoroso AP, et al Functional hypothalamic amenorrhea and dietary intervention: A systematic review to guide further research in amenorrheic women without overt eating disorder
2025 systematic review examining dietary intervention in FHA and the remaining uncertainty around exact energy requirements and recovery timelines.
Healthdirect Australia Luveris
Current Australian medicine information for lutropin alfa, including its prescription indication with recombinant FSH in women with severe LH and FSH deficiency.
Pregnancy, Birth and Baby / Healthdirect Australia Preconception health for females
Australian guidance on preconception health and the limited evidence for complementary and alternative medicines improving fertility.
Healthdirect Australia Lactational amenorrhoea method
Australian guidance explaining how breastfeeding-related prolactin can temporarily suppress hormones involved in ovulation.
Human Reproduction Update The LH surge and ovulation re-visited: a systematic review and meta-analysis
2022 systematic review showing substantial variation in LH-surge patterns and in the interval between surge onset and ovulation.
Healthdirect Australia Planning for your pregnancy
Australian preconception guidance on ovulation tracking and when to seek medical advice after trying to conceive.