dat in 2 days, please help!

[avian777]

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Can someone clarify this for me?
according to topscore#1 question 11 "During the ovarian ovulation phase, you would expect an increase in estrogen follow by a surge in LH".
However, this is what I got from a physiology textbook borrowed from a friend : "Just prior to ovulation, the follicle stops secreting estrogen and blood estrogen levels fall and the surges of LH and FSH at mid-cycle induce ovulation"

so what is right?
thanks

 

[Sea of ASH]

from what i read, i know that there is an increase in estrogen which causes the surge in LH. surge in LH is the reason for ovulation.

 

[heatwheat]

This is taken from Kaplan. "Ovulation is caused by a surge in LH which is preceded, and in part caused, by a peak in estrogen levels."

 

[Mamona]

from what i read, i know that there is an increase in estrogen which causes the surge in LH. surge in LH is the reason for ovulation.

I agree with you. I took endocrinology and embryology last semester and that is the way it works

 

[tranv117]

leading up to ovulation, estrogen secretion has a postive feedback mechanism in order to develop the growing follicle. After ovulation, estrogen follows a negative feedback regulation because you no longer want to develop anymore follicles and release more eggs.