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

Tingling or numbness in hands - symptoms of diabetes, Tingling or numbness...

Tingling or numbness is seen in cases of neuropathy. It occurs gradually over time. As high sugar (glucose) in the blood damages the nervous system, particularly in the extremities

Determine the method of recombination, Which of the following is a false st...

Which of the following is a false statement regarding the method of recombination or crossing-over? A. Crossing-over takes place during prophase I of meiosis B. Recombinatio

What is adaptive radiation?, What is adaptive radiation? The Adaptive r...

What is adaptive radiation? The Adaptive radiation is the appearance of several other species from one common ancestral species that have spread to various regions or environme

Aortic valve repair-types of surgery in ar, Aortic Valve Repair :  ...

Aortic Valve Repair :  In, acquired AR associated with VSD and prolapse of a cusp, repair is often successful. VSD is closed and at the same time the prolapsed part of

Determine immunodeficiency presented by aids patients, What is the cause of...

What is the cause of the immunodeficiency presented by AIDS patients? The cause of the immunodeficiency shown by AIDS patients is the destruction of CD4 T helper lymphocytes by

Explain performance testing of fats and oil, Explain performance testing of...

Explain performance testing of fats and oil In these cases, performance testing is the only means for evaluating the ability of fat or oil to perform the desired functions in a

Define the effect of deficiency of vitamin c, Define the effect of Deficien...

Define the effect of Deficiency of Vitamin C? Severe ascorbic acid deficiency results in the development of the disease known as scurvy, three important manifestations of scur

Mechanical prosthetic valves, Mechanical Prosthetic Valves :  These patien...

Mechanical Prosthetic Valves :  These patients should have lifelong anticoagulation. In the absence of anticoagulation systemic embolism and strokes have been reported to be 5-50

Biomolecules, How do you explain in the absence of aldehyde group in the pe...

How do you explain in the absence of aldehyde group in the pentaacetate of D-glucose? Ans) when you react glucose with acetic anhydrate it forms pentaacetate with 5 OH grops it tel

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