Explain working of hypophysis- ovaries endocrine axis, Biology

Assignment Help:

Q. Does the hypophysis- ovaries endocrine axis work in the same way during pregnancy as in non-pregnant women? If pregnancy does not occur how does another menstrual cycle begin?

The functioning of the hypophysis is altered during pregnancy since progesterone and estrogen levels remain elevated during the gestational period the production of GnRH (gonadotropin-releasing hormone) from the hypothalamus is inhibited. The lack of GnRH thus inhibits the secretion of LH and FSH from the hypophysis and a new menstrual cycle does not begin.

If pregnancy does not occur the lowering of progesterone and estrogen levels stimulates the production of GnRH by the hypothalamus. This hormone then hastens the adenohypophyseal secretion of LH and FHS that in their turn stimulate the maturation of follicles and the beginning of a new menstrual cycle.


Related Discussions:- Explain working of hypophysis- ovaries endocrine axis

Biogenesis of mitochondria, BIOGENESI S OF MITOCHONDRIA De Novo for...

BIOGENESI S OF MITOCHONDRIA De Novo formation i.e. new formation. It is not confirmed. New mitochondria are formed by division (Amitosis) of pre-existing mitochondria.

Difference between spermatogenesis and oogenesis, DIFFERENC E BETWEEN SPER...

DIFFERENC E BETWEEN SPERMATOGENESIS AND OOGENESIS - S.NO . SPERM A T OGENESIS OOGENESIS 1.   2.   3.

Discuss mental nerve and its anatomic variation, Discuss mental nerve, its ...

Discuss mental nerve, its anatomic variation and surgical importance. Mental nerve, branch of inferior alveolar nerve is a very important landmark during osteotomy procedures.

Aspergillosis, Aspergillosis Aspergillosis is the most common chronic,...

Aspergillosis Aspergillosis is the most common chronic, granulomatous, necrotizing and cavitary disease of lungs, and is characterized by formation of white yellowish caseous

Define the term hot water blanching, Define the term Hot water blanching? ...

Define the term Hot water blanching? A appropriate water-blanching process in traditional processing is as follows: The sliced material is placed on a square piece of cl

Define water balance - hormonal control of fluid balance, Define Regulation...

Define Regulation of Water Balance - Hormonal Control of Fluid Balance? Hormonal control of fluid balance: When water intake is insufficient or water loss is excessive, the kid

Peacock, exoskeleton of peacock

exoskeleton of peacock

Possible errors in drug administration, POSSIBLE ERRORS IN DRUG ADMINISTRAT...

POSSIBLE ERRORS IN DRUG ADMINISTRATION There can be various reasons for error in administering drugs: i) Poor communication of intention by the prescriber. ii) Failur

Hydralazine, Hydralazine is a potent arteriolar dilator and markedly increa...

Hydralazine is a potent arteriolar dilator and markedly increases cardiac output in patients with congestive heart failure. However, as a single agent, it has not been shown to imp

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd