Health and MedicineMedical testLuteinizing hormone (LH): what it is, functions and normal values

Luteinizing hormone (LH): what it is, functions and normal values

Luteinizing hormone (LH) appears during ovulation, and can help tell if a woman is ovulating or not. Find out when your analysis is done and what it is for.

Luteinizing hormone (LH), which is also known medically by the name of lutropin, is a gonadotropin hormone produced by the anterior pituitary gland, specifically the pituitary gland, which is located in the lower side of the brain. Your examination or analysis, therefore, is adequate to know the levels of this hormone in the blood, which allows you to know if the woman is ovulating if she has reached menopause. It is very useful when the woman has problems getting pregnant or when she has periods that are not regular.

In fact, this test is also useful in the case of men, when, for example, the couple has been trying to get pregnant for some time and conception has not yet occurred (that is, if there are possible signs or signals of sterility), or they feel that libido is decreased.

What are the main functions of luteinizing hormone?

In women, when there is a surge in luteinizing hormone, ovulation occurs. This occurs towards the end of the follicular phase, when the secretion of this hormone naturally increases, which tends to actually last a few days (one to two days).

It is at this time that ovulation begins; that is, the extraction of the oocyte from the ovary occurs, which in turn induces the secretion of other hormones (as is the case of progesterone) in order to prepare the endometrium for the possible implantation of the embryo, in the event that it occurs. Conception and therefore the ovum have been fertilized.

During the first 15 days after conception, the luteinizing hormone is of vital importance, since it helps maintain the function of the corpus lutein, while the body begins to produce the hormone human chorionic gonadotropin (chg.), traditional and commonly known as the “pregnancy hormone”, which in turn helps progesterone levels remain adequate during the first months of pregnancy, and will nourish the corpus lutein so that the woman’s body does not reject the fetus during pregnancy. First trimester of pregnancy.

What is the luteinizing hormone test and what is it used for?

It is a useful blood test to know the levels of luteinizing hormone (LH) in the blood, which is a hormone secreted by the pituitary gland, a gland that we find in the lower side of the brain.

Bearing in mind, as we mentioned, that LH is a hormone that begins to be secreted in greater amounts towards the final stage of the follicular phase, starting ovulation, its examination allows us to understand why a woman may have an absence of menstruation, or if there is a cause that is preventing pregnancy normally (infertility or hypogonadism).

In other words, the luteinizing hormone test is very useful to know the status and functionality of the ovaries. And, in addition, it is also useful to discover if the man could also be suffering from an infertility problem.

Normal values ​​of luteinizing hormone in women

Depending on when a woman is in her period, levels of luteinizing hormone tend to vary

Normal values ​​of luteinizing hormone in men

Since luteinizing hormone levels are also very helpful in men

Causes of Abnormal Luteinizing Hormone (LH) Values

Depending on whether the levels are abnormal in men or women, their causes will obviously be different. Thus, for example, in women it could be due to the non-existence of ovulation, when there is an imbalance in female sex hormones (very common in the case of polycystic ovary syndrome), during menopause, if there is ovarian hypo function (the ovaries produce little or no hormones), and in the case of a genetic condition in which women do not have the normal pair of two X chromosomes (Turner syndrome).

In the case of the name, however, its causes are the following: absence of testicles, the testicles do not function (anarchic), hyperactive endocrine glands or the presence of Klinefelter syndrome.


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