Directions: From the following choices, select the appropriate word that would
make the sentences correct. Choose only the letter.
A. Hormones
D. Ovum
G. proliferative
J. negative
B. GnRH
E. Follicle
H. Ovulation
C. LH
F. Estrogen
I .progesterone

During menstruation, levels of female (1.)______are low. In thefollicular phase (days 1 - 14), low levels of hormones are detected by the
hypothalamus, which releases (2.)_______.This is sent to the pituitary gland, which releases FSH and (3)_______.FSH causes several immature (4.)_______,along with their surrounding (5.)________cells,
in the ovaries to begin to develop. The developing follicle cells release increasing
amounts of (6.)______.This hormone is responsible for the (7.)_______ phase of the uterine cycle. In the uterus, blood vessels and glands
proliferate. Rising levels of estrogen cause the release of a large amount of LH on
about day 13 which causes (8.)________. High levels of (9.)_______ cause (10.)________ feedback to the anterior pituitary, shutting down therelease of LH. Lower levels of LH cause the corpus luteum to disintegrate. Since it
is breaking down, it can no longer release estrogen and progesterone.

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