que. - savi

[ArchivalUser]

A 25-year-old woman with regular menses is given an estrogen challenge. The challenge consists of exogenous estrogen supplementation to see if her LH level will increase. Which of the following regimens would be most effective?

A. Estradiol 20 days after menses

B. Estrogen 10 days after menses

C. Progesterone 10 days after onset of menses

D. Progesterone 20 days after onset of menses

E. Synthetic FSH 15 days after onset of menses

[ArchivalUser]

I think E

[ArchivalUser]

b ans ?

[ArchivalUser]

I also think is B, estrogen 10 day after menes will cuase a positive feedback rise is LH

[ArchivalUser]

the answer is D as i think because estrogen helps in ovulation and formation of luetel body in the ovary and progestrone keeps secretion of lh from lueteal body and lh will reach peak at 20 dayes of cycle

[ArchivalUser]

correct answer is B.Explanation by love4all is correct.More estrogen is required to increase LH levels by positive feedback.

[ArchivalUser]

estrogen is one of the few limited positive feedback mechanism in human body, in lower level it inhibit the LH but at higher level it is positive feed back for LH and estrogen itself.