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Hormone that causes follicle to mature

Hormone imbalance is best understood...

The follicular phase is the phase of the estrous cycleor, in humans and great apesthe menstrual Hormone that causes follicle to mature during which follicles in the ovary mature. It ends with ovulation. The main hormone controlling this stage is estradiol. There are several steps in the process of follicular development that occur in the follicular phase: Initiation, Recruitment and progression, Pre-ovulatory maturation and Ovulation.

These processes occur in different areas of the body and will be briefly explained below. Follicle-stimulating hormone FSH is secreted by the anterior pituitary gland Figure 2. FSH secretion begins to rise in the last few days of the previous menstrual cycle, [2] and is highest and most important during the first week of the follicular phase [3] Figure 1.

The rise in FSH Hormone that causes Hormone that causes follicle to mature to mature recruits five to seven tertiary-stage ovarian follicles this stage follicle is also known as a Graafian follicle or antral follicle for entry into the menstrual cycle. These follicles, that have been growing for the better part of a year in a process known as folliculogenesiscompete with each other for dominance.

FSH induces the proliferation of granulosa Hormone that causes follicle to mature in the developing follicles, and the expression of luteinizing hormone LH receptors on these granulosa cells Figure 1.

The follicular phase is the...

Under the Hormone that causes follicle to mature of FSH, aromatase and p enzymes are activated, causing the granulosa cells to begin Hormone that causes follicle to mature secrete estrogen. This increased level of estrogen stimulates production of gonadotropin-releasing hormone GnRHwhich increases production of LH.

Throughout the entire follicular phase, rising estrogen levels in the blood stimulates growth of the endometrium and myometrium of the uterus. Two or three days before LH levels begin to increase, [6] usually by day seven of the cycle, [7] one or occasionally two of the recruited follicles has emerged as dominant.

Many endocrinologists believe that the estrogen secretion of the dominant follicle has increased to a level that GnRH production is suppressed, which lowers the levels of LH and FSH. This slowdown in LH and FSH production leads to the atresia death of most of the recruited follicles, though the dominant Hormone that causes follicle to mature continues to mature.

Estrogen levels will continue to increase for several Hormone that causes follicle to mature on average, six days, but this varies widely. These high estrogen levels initiate the formation of a new layer of endometrium in the uterus, histologically identified as the proliferative endometrium. Crypts in the cervix are also stimulated to produce fertile cervical mucus. Estrogen levels are highest right before the LH surge begins Figure 1.

The short-term drop in steroid hormones between the beginning of the LH surge and the event of ovulation may cause mid-cycle spotting or bleeding. The surge also initiates luteinization of thecal and granulosa cells. Follicular waves are best described as the phase Hormone that causes follicle to mature when the follicular had matured sufficiently, therefore, ruptures and ovulation can commence [1]. In addition, those of the single follicles that mature until they rupture to release the egg during ovulation.

Recent Hormone that causes follicle to mature into the menstrual cycle in mammals has discovered that 2 or more follicles can develop but only one of the follicles fully matures to release the egg. From Wikipedia, the free encyclopedia. This article needs more medical references for verification or relies too heavily on primary sources.

Please review the contents of the article and add Hormone that causes follicle to mature appropriate references if you can. Unsourced or poorly sourced material may be challenged and removed. Rutgers University Department of Animal Sciences.

De Groot, Leslie J. Reproduction and Development, and Chapter 23 Endocrine control of growth and metabolism. Initial and cyclic recruitment of ovarian follicles. Endocrine Reviews,21 2.

Follicle stimulating hormone is produced...

Widmaier, Hershel Raff, Kevin T. Vander's human physiology the mechanisms of body function 10th ed. Taking Charge of Your Fertility Revised ed. Comprehensive Gynecology Fourth ed. Sellergren; Kathleen Stern; et al. Journal of Sex Research. Journal of Dairy Science. Human physiology of sexual reproduction. Menarche Menstruation Follicular phase Ovulation Luteal phase.

Spermatogenesis spermatogonium spermatocyte spermatid sperm Oogenesis oogonium oocyte ootid ovum Germ cell gonocyte gamete. Ovum Oviposition Oviparity Ovoviviparity Vivipary. Hypothalamic—pituitary—gonadal axis Hypothalamic—pituitary—prolactin axis Andrology Hormone. Thelarche Development Lactation Breastfeeding. Menstruation Follicular phase Ovulation Luteal phase. Basal body temperature Cervical mucus Mittelschmerz. Extended cycle combined hormonal contraceptive Lactational amenorrhea.

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This page was last edited on 30 Julyat By using this site, you agree to the Terms of Use and Privacy Policy. Menstrual cycle illustrating hormone levels, follicle development and uterine Hormone that causes follicle to mature. Signs Basal body temperature Cervical mucus Mittelschmerz.

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