Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Endocrine Interactions
At the beginning of menstruation the inhibitory influence of the corpus luteum on the pituitary is removed and FSH is secreted in increasing amounts. This stimulates the growth of the young follicles, and they grow, they release increasing quantities of estrogens. The high estrogen content of the blood causes the pituitary to diminish its production of FSH and increase the output of LH. Ovulation occurs when the balance between FSH and LH has swung sufficiently in favour of LH.
Figure: Diagram showing changes in the endometrium, the ovaries and the circulating ovarian hormones during the menstrual cycle.
There is evidence that small amounts of are produced by the preovulatory follicle, and this hormone may be involved in the ovulatory process perhaps through its action on the brain or the anterior hypophysis. After ovulation, the corpus luteum begins to form in the ruptured follicle under the influence of LH. Gonadotropins activate the corpus luteum and cause it to secrete progesterone and small amounts of estrogen. If a fertilised egg is not produced, functional degeneration of the corpus luteum begins eight to ten days after ovulation. The onset of menstrual bleeding correlates with the withdrawal of progesterone and, to a lesser extent of estrogen in the breakdown of the endometrial blood vessels with subsequent bleeding remain largely unknown. If the egg is fertilised, the pituitary continues to release luteinizing hormone, and the corpus luteum increases in size and augments its output of hormones. Secretory competence of the corpus luteum diminishes slowly after the fourth month of pregnancy, although it remains structurally intact until the end of pregnancy. The placenta, rather than the ovary, is the principal source of progesterone and estrogen during the latter half of pregnancy. Removal of the ovaries after mid pregnancy neither terminates pregnancy nor diminishes the levels of the two types of steroid hormones in the circulation.
what are the modes of reproduction?
Unsaturated fatty acids require some additional processing before they can be degraded completely by β-oxidation. The Unsaturated fatty acyl CoAs with double bonds at odd-numbered
Besides being fundamental for the activation of the main gastric digestive enzyme how does HCl also directly participate in digestion? With its corrosive effect, HCl also helps
TEST TUBE BABY - Ova are fertilized in laboratory dish (in vitra) containing a nutrient broth . It may be artificial insemination donor (AID) / Artificial insemination h
Define Estimation of Blood Thiamin Levels - Thiamin Status? The levels of free thiamin and its phosphoesters in whole blood and erythrocytes are measured using high- performanc
Until the Krebs cycle, aerobic respiration can be explained without mentioning oxygen, the chemical element after which the reaction gets its name. Where in the process does this c
what are four types of microorganisms and their definitions?
What morphological structure is responsible for bacterial motility?
Determine the type of bandage The most common type of bandage is the gauze bandage, a simple woven strip of material which comes in different widths and lengths.
llustrate the role of each area in the evolution of the Hebe Uses appropriate examples from the Hebe data to illustrate the role of each area/concept in the evolution of the He
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd