₹500.00 – ₹570.00
The following could be reasons why LH test is advised by your physician:
Luteinizing hormone is associated with reproduction and ovulation. In females, it stimulates the release of an egg from the ovary. However, in males, testosterone production is dependent on LH. This test helps in measuring the amount of LH present in the blood.
LH is produced by the pituitary gland, and its production is controlled by the hypothalamus, pituitary gland, and the hormones produced by the ovaries (in women) or testicles (in men).
In premenopausal women, LH stimulates ovulation and the production of other hormones, estradiol, and progesterone. The menstrual cycle is divided into 2 phases, follicular and luteal phases, each of these last for about 14 days. Near the end of the follicular phase, there is a mid-cycle increase in follicle-stimulating hormone (FSH) and LH. This triggers ovulation. During the luteal phase, LH secretion stimulates the corpus luteum to start producing progesterone. At this point, FSH and LH levels get reduced, while progesterone and estradiol concentrations rise. If the egg is not fertilized, then the levels of these hormones fall after several days followed by the beginning of the next menstrual cycle. With the onset of menopause ovarian function reduces and eventually discontinues, which results in increased levels of FSH and LH.
In men, LH stimulates Leydig cells in the testicles to produce testosterone. However, LH levels remain relatively constant in men after puberty. A high testosterone level provides negative feedback to the pituitary gland and the hypothalamus, thus decreasing the amount of LH secreted.
In infants and children, LH levels rise shortly after birth and then fall to very low levels (by 6 months in boys and 1-2 years in girls). At about 6-8 years of age, levels again rise before the beginning of puberty and secondary sexual characteristics development.
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