What cause LH to be released?

Answer 1

• In females, at the time of menstruation, FSH initiates follicular growth, specifically affecting granulosa cells.[5] With the rise in estrogens, LH receptors are also expressed on the maturing follicle that produces an increasing amount of estradiol. Eventually at the time of the maturation of the follicle, the estrogen rise leads via the hypothalamic interface to the "positive feed-back" effect, a release of LH over a 24-48 hour period. This 'LH surge' triggers ovulation thereby not only releasing the egg, but also initiating the conversion of the residual follicle into a corpus luteum that, in turn, produces progesterone to prepare the endometrium for a possible implantation. LH is necessary to maintain luteal function for the first two weeks. In case of a pregnancy luteal function will be further maintained by the action of hCG (a hormone very similar to LH) from the newly established pregnancy. LH supports thecal cells in the ovary that provide androgens and hormonal precursors for estradiol production.

Answer 2

Its main purpose is to promote ovulation. The release of LH, or lutienizing hormone, is influenced by many factors. The main process of the menstrual cycle in females is controlled by hormonal control and negative feedback systems by the hypothalamus.

LH is released as part of the female menstrual cycle. Its partner is follicle stimulating hormone (FSH), these two hormones work to achieve ovulation, which is controlled by LH. If fertilization does not take place, then their levels drop and menstruation begins. Progesterone and estrogen play a role in this as well. If fertilization takes place, these two hormones help prepare and support fetal development. The pineal gland plays a role in this as well, and is influenced by the amount of available full spectrum light. For example: In the springtime, when the days get longer, female birds are more likely to ovulate because the pineal gland allows more LH to be released.

Answer 3

Luteinizing hormone (LH) is released by the pituitary gland in response to gonadotropin-releasing hormone (GnRH) produced by the hypothalamus. The release of LH is pulsatile and is regulated by a negative feedback loop involving sex hormones like estrogen and testosterone. LH plays a crucial role in the regulation of the reproductive system, particularly in ovulation and stimulation of testosterone production in males.