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What is the relationship between estrogen levels and the LH surge in the menstrual cycle?
Estrogen levels rise during the first half of the menstrual cycle, leading to the LH surge. This surge triggers ovulation, the release of an egg from the ovary.
Ovulation occurs due to a surge in A. FSH concentrations. B. estrogen and FSH concentrations. C. LH concentrations. D. estrogen concentrations. E. estrogen and LH concentrations?
C.
Why do estrogen in high dose cause LH serge?
It is actually the serge in LH that causes estrogen to be prduced in high dosages. The reason behind this is as there is an increase in estrogen, the uterine lining becomes filled with blood and thickens in preparation for implantation. At the same time, the surge in LH makes the cervical mucus thinner so that the sperm can reach the egg in order to fertilize it.
The surge in LH secretion from the anterior pituitary that causes ovulation can be partially explained by the?
positive feedback of estradiol that increases the release of LH
What stimulates the release of LH?
The release of luteinizing hormone (LH) is stimulated by a surge in levels of gonadotropin-releasing hormone (GnRH) from the hypothalamus and is also influenced by estrogen and testosterone levels. This surge triggers the anterior pituitary gland to release LH, which is essential for the regulation of the menstrual cycle and the production of sex hormones.
For ovulation when the oocyte is discharged high level of following hormones is required LH and?
LH (luteinizing hormone) surge triggers ovulation by inducing the release of the oocyte from the ovarian follicle. Additionally, high levels of estrogen also play a crucial role in promoting ovulation by stimulating the production of LH.
What causes the peak in luteinizing hormone?
In the beginning of the menstrual cycle, LH and FSH stimulate the ovaries to make estrogen. During this time, there is a negative feedback loop, so levels of all three hormones are rather low. Eventually, as the estrogen levels slowly creep up, there comes a time when it switches from negative feedback to positive feedback (not exactly sure what the biochemical basis of this is), and LH and FSH levels skyrocket (estrogen levels go up to, but not as sharply, and there is always more LH than FSH). The LH surge causes ovulaton. The corpus luteum starts secreting progesterone, which inhibits LH and FSH secretion in a negative feedback manner, and so FSH and LH levels drop sharply.
What hormone is secreted by the follicle wall during ovulation?
In the late maturation follicular phase, the dominant follicle level secretion of estrogen crosses a certain threshold stimulating Luteinizing Hormone (LH) secretion, which in turn stimulates more estrogen production by the follicle. The result is a rapid increase in LH secretion, the LH surge, and therefore triggers the rupture of the dominant follicle, in other words, ovulation.
Which hormone stimulates the corpus luteum to produce progesterone and estrogen?
Luteinizing Hormone (LH)
Which hormone is critical in the actual release or rupturing of a mature ovum?
Luteinizing hormone (LH) is critical in triggering the release of a mature ovum from the ovary, a process known as ovulation. LH surge occurs around the middle of the menstrual cycle, signaling the follicle to release the egg.
A sudden surge in lh concentration causes?
a surge of testosterone in males and it causes ovulation in females.
Is LH produced in contraceptive pills?
The morning after pill disrupts the LH surge. That's part of how it works. The morning after pill does not contain LH.
