Luteinizing hormone (LH)

Question 1

 Also known as lutropin is a hormone produced by the anterior pituitary gland.
 Important markers in diagnosing fertility and menstrual cycle disorders
 The release of LH at the pituitary gland is controlled by pulses of gonadotropin-releasing hormone (GnRH) from the hypothalamus. Those pulses, in turn, are subject to the estrogen feedback from the gonads.

Answer 1

Luteinizing hormone (LH)

Question 2

In the female, an acute rise of LH – the LH surge – triggers

Answer 2

ovulation

Question 3

 In the male, where LH had also been called
 It stimulates ______cell production of testosterone

Answer 3

Interstitial Cell Stimulating Hormone (ICSH); Leydig

Question 4

LH levels are normally low during childhood and, in women, high after __________.

Answer 4

menopause

Question 5

Persistently high LH levels are indicative of situations where the normal restricting feedback from the gonad is absent, leading to a pituitary production of both___________. While this is typical in the menopause, it is abnormal in the reproductive years.

Answer 5

LH and FSH

Question 6

High LH levels may be a sign of:

Answer 6

1. Premature menopause
2. Gonadal dysgenesis, Turner syndrome
3. Castration
4. Swyer syndrome
5. Polycystic Ovary Syndrome
6. Testicular failure

Question 7

Diminished secretion of LH can result in failure of gonadal function (hypogonadism). This condition is typically manifest in males as failure in production of normal numbers of sperm. In females, ____________is commonly observed.

Answer 7

amenorrhea

Question 8

Conditions with very low LH secretions are:

Answer 8

1. Kallmann syndrome
2. Hypothalamic suppression
3. Hypopituitarism
4. Eating disorder
5. Hyperprolactinemia
6. Gonadotropin deficiency