Long, stretchy cervical mucus that exhibits ferning on a microscope slide is characteristic of which of the following?
A)
Crystallization of inorganic salts
B)
Low estrogen levels
C)
High progesterone levels
D)
Low human chorionic gonadotropin levels
Ans:
A
Feedback:
Cervical mucus that exhibits ferning and so-called spinnbarkeit occurs right around the time of ovulation (midcycle) due to increased water content and alteration in the concentration of inorganic salts. This is influenced by high serum levels of estrogen, which lead to the LH spike that promotes ovulation (bursting of the oocyte from the mature follicle). Progesterone levels increase only after ovulation during the luteal phase, at which point the cervical mucus "dries up" (becomes more scant).
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