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Old 03-25-2014
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Default Nbme question answer urgently needed pls

2)A 35 year old woman participate in a study of a new diagnostic test of steroid hormones in saliva. Menses occur at regular 28 day intervals and she has been shown to ovulate on day 14 when her saliva is tested on a particular day of the cycle, laboratory studies show an increased concentration of estradiol and decreased concentration of progesterone. On which of the following days in this patient`s menstrual cycle were these hormones most likely measured?
A) Day 1
B) Day 6
c) Day 12
D) Day 18
E) Day 26
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Old 11-21-2014
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Default C. Day 12

Between approximately days 9- 13, the estradiol level dramatically rises. At a certain point, it no longer has an inhibitory effect on LH and FSH, but paradoxically a stimulatory effect. The oocyte exits from the follicle, the new corpus luteum is stimulated by LH to secrete considerable progesterone, and the luteal phase continues.

However, the progesterone level would be much below that of estradiol UNTIL after the LH surge. Answer= C
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