Question

the graph shows the changing levels of hormones during menstruation and ovulation.
follicular phase
ovulation
luteal phase
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
hormone level
in general, what happens to the hormone levels between days 21 and 27, just prior to menstruation if the egg was not fertilized?
hormone levels generally decrease.
hormone levels generally rise.
hormone levels remain the same.
hormone levels go in two different directions.

Explanation:

To determine the hormone levels between days 21 - 27 (luteal phase, no fertilization), we analyze the graph. In the luteal phase, if the egg isn't fertilized, the corpus luteum degenerates. This leads to a decrease in hormone production (like progesterone and estrogen). The graph's trend for this period (post - peak in luteal phase) shows a decline. So the hormone levels generally decrease.

Answer:

A. Hormone levels generally decrease.