LH-Luteinising Hormone test

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Know more about LH-Luteinising Hormone test

The LH blood test measures the amount of luteinizing hormone (LH) in blood. In women, an increase in LH level at mid-cycle causes release of eggs (ovulation). Your doctor will order this test to see if: You are ovulating, when you are having trouble getting pregnant or have periods that are not regular You have reached menopause In man, the test may be ordered if you have signs of infertility or lowered sex drive. The test may be ordered if you have signs of a pituitary gland problem.

In adults, LH (and FSH) tests may be ordered when: 

A woman is having difficulty getting pregnant or has irregular or an absence of menstrual periods

When it is suspected that a women has entered menopause and her menstrual cycle has stopped or become irregular

When a man's partner cannot get pregnant, when he has a low testosterone level, or when he has low muscle mass or decreased sex drive, for example. 

When a health practitioner suspects that a pituitary disorder is present; a pituitary disorder can affect the production of several different hormones so there may be signs and symptoms in addition to infertility that can include fatigue, weakness, unexplained weight loss, and decreased appetite to name a few. 

In children, LH and FSH may be ordered when a boy or girl does not appear to be entering puberty at an appropriate age (either too late or too soon). Signs of puberty may include: 

Breast enlargement in girls

Growth of pubic hair

Growth of testicles and penis in boys

Beginning of menstruation in girls. 

Men and women with LH deficiency secondary to pituitary dysfunction require treatment depending on the presenting symptoms and associated hormonal disorders. Most commonly, these patients have a pituitary adenoma and hyperprolactinemia. Men and women who desire fertility are best treated medically with a dopamine agonist which inhibits prolactin secretion. Most patients with macroadenomas are treated with a dopamine agonist to decrease the chance of further growth. Women with hyperprolactinemia who do not desire fertility but have amenorrhea are treated with oral contraceptives or cyclic estrogen and progestin as long as they do not have a macroadenoma. Panhypopituitarism can result in life-threatening adrenal crisis. Patients with this condition require lifelong treatment with replacement thyroid and adrenal hormones in addition to the medical treatment. 

Estrogen is given to females with delayed puberty, which helps in developing secondary sexual traits like breast, pubic hair, and body shape. Gonadotropin injections are given to adult women to start ovulation. Progestins decrease the risk of endometrial cancer. Weight gain helps resume normal menses in women suffering from eating disorders. Testosterone is given to males with delayed puberty, which helps in restoring sex drive and in developing secondary sexual traits like pubic hair and masculinity. Gonadotropin-releasing hormone pump can deliver gonadotropin-releasing hormone under the skin in men. Gonadotropin-releasing hormone and clomiphene citrate treatment, both improve sexual function and sperm production.

Treatment of hypogonadotropic hypogonadism depends on the gender and age of the patient as well as their desire for current fertility. 

Females with delayed puberty secondary to hypogonadotropic hypogonadism are treated with estrogen to promote development of secondary sexual characteristics. Adult women with hypogonadotropic hypogonadism who desire fertility undergo ovulation induction with injectable gonadotropins. Clomiphene citrate is typically not effective for inducing ovulation in these patients. Women who do not desire pregnancy are treated with estrogen to prevent osteoporosis. Cyclic progestins are added to decrease the risk of endometrial cancer. 

Test Method 1 : The test requires a blood sample, which is drawn through a needle from a vein in your arm. 

Report available : Turn around time is 24 hours. 

A person have the following symptoms should get this done: 

In adults, LH (and FSH) tests may be ordered when: 

A woman is having difficulty getting pregnant or has irregular or an absence of menstrual periods

When it is suspected that a women has entered menopause and her menstrual cycle has stopped or become irregular

When a man's partner cannot get pregnant, when he has a low testosterone level, or when he has low muscle mass or decreased sex drive, for example. 

When a health practitioner suspects that a pituitary disorder is present; a pituitary disorder can affect the production of several different hormones so there may be signs and symptoms in addition to infertility that can include fatigue, weakness, unexplained weight loss, and decreased appetite to name a few. 

In children, LH and FSH may be ordered when a boy or girl does not appear to be entering puberty at an appropriate age (either too late or too soon). Signs of puberty may include: 

Breast enlargement in girls

Growth of pubic hair

Growth of testicles and penis in boys

Beginning of menstruation in girls. 

Polycystic ovary syndrome (PCOS) Adrenal disease Thyroid disease Ovarian tumor Kallmann syndrome