The blastocyst implants in the uterus on about the ________ day of the 28-day menstrual cycle. At this time, the endometrium is ________ and progesterone levels are ________.
A. 14th; thick and secretory; low
B. 28th; thin and proliferating; high
C. 21st; thin and proliferating; low
D. 28th; thick and secretory; low
E. 21st; thick and secretory; high
Answer: E
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the obribicularis oculi can complete action _________________.
Fill in the blank(s) with the appropriate word(s).