LH levels are normally low during childhood. Normal result for men over 18 years of age is around 1.8 to 8.6 IU/L. Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples.
Here are normal ranges: Men: 1.24 to 7.8 IU/mL. Women, follicular phase of menstrual cycle: 1.68 to 15 IU/mL.
As men age, there is a small and progressive (not precipitous, as in women) decline in several sex hormones, in particular testosterone and dehydroepiandrosterone, and related increases in luteinizing hormone, follicle-stimulating hormone, and sex hormone-binding globulin.
For men, the normal levels are around 1.8-8.6 IU/L. For children, LH levels are generally low. Keep in mind that the “normal” value ranges can differ depending on the lab, so you should always talk to your doctor about what your result means for you.
When is LH the highest? During your cycle, LH levels are highest about 10-12 hours before ovulation and can reach 30 IU/L or higher. This peak LH level is called the LH surge. It's also common to see high LH levels during menopause, ranging from 19.3 to 100 IU/L.
Normal Levels of FSH and LH
Hormone levels can be diagnosed by a simple blood test. The normal range of the FSH in adult males is 1.5 – 12.4 mIU/mL and for LH is 1.7-8.6 mIU/mL. Increase in the FSH level indicates that the testicles are not functioning well.
If you are a man, high LH levels may mean: Your testicles have been damaged due to chemotherapy, radiation, infection, or alcohol abuse. You have Klinefelter's syndrome, a genetic disorder that affects sexual development in males. It often causes infertility.
These results indicate that testosterone levels alone do not tell the whole story about androgen status in older men with erectile dysfunction. Low testosterone levels predicted erectile dysfunction only among men with high LH levels, a combination of hormone levels suggesting primary testicular failure.
High LH and insulin levels cause the ovaries to produce more testosterone.
Conclusions. Elevation of LH with normal T is predicted by multiple factors, reverts frequently and is not associated with unequivocal evidence of androgen deficiency. High LH is a biomarker for deteriorating health in aged men who tend to develop primary hypogonadism.
In both sexes, LH contributes to the maturation of primordial germ cells. In men, LH causes the Leydig cells of the testes to produce testosterone. In women, LH triggers the creation of steroid hormones from the ovaries [1].
Some say the standard LH range is 5 to 25 IU/L for women before menopause. Some people have naturally elevated LH and some have multiple surges throughout their cycle. One study shows that a median LH surge before ovulation was about 46 IU/L, but a normal surge level could be as high as 101 or as low as 6.5.
Low LH levels can signify that your pituitary gland isn't making the LH needed to spur changes in your body that support sexual development or reproduction. Low LH levels can be a sign of: Kallmann syndrome: A rare condition that leads to insufficient testosterone and estrogen production.
A healthy diet, sufficient exercise (but not excessive exercise), and proper amounts of vitamin B12, vitamin C, and zinc also improve fertility. regular intervals and restore fertility. increases the LH supply and can stimulate the testes to produce testosterone and sperm. production.
Untreated LH deficiency will result in infertility, and if it occurs before puberty, the patient will fail to develop puberty and secondary sexual characteristics. The lack of testosterone will lead to loss of muscle mass, bone density loss, and loss of sex drive in men.
Higher LH levels in older men may have an effect on the development of benign prostatic hyperplasia or prostate carcinoma [16].
It is also known as hypogonadotrophic hypogonadism due to low levels of LH and FSH resulting in decreased testosterone production. Secondary hypogonadism often occurs as part of a wider syndrome of hypopituitarism.
Levels of LH are low for most of the monthly menstrual cycle. However, around the middle of the cycle, when the developing egg reaches a certain size, LH levels surge to become very high. A woman is most fertile around this time. People refer to this interval as the fertile window or fertile period.
In conclusion, release of LH, but not FSH, was correlated with increasing dosages of GnRH (r = 0.970), and testosterone significantly suppressed GnRH-stimulated LH release in the mouse (P < . 05).
Despite being a sexually dimorphic trait in humans, height does not appear strongly and consistently related to circulating testosterone levels in adult men (Kowal et al., 2021) .
Usually, in healthy women, the ratio between LH and FSH usually lies between 1 and 2. In polycystic ovary disease women, this ratio becomes reversed, and it might reach as high as 2 or 3 (8). As a result of raised LH/FSH ratio, ovulation does not occur in polycystic ovary disease patients (9).