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MENSTRUAL CYCLE
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I. (noun)
Sense 1
Meaning:
A recurring cycle (beginning at menarche and ending at menopause) in which the endometrial lining of the uterus prepares for pregnancy; if pregnancy does not occur the lining is shed at menstruation
Example:
the average menstrual cycle is 28 days
Classified under:
Nouns denoting time and temporal relations
Hypernyms ("menstrual cycle" is a kind of...):
cycle; oscillation (a single complete execution of a periodically repeated phenomenon)
Meronyms (parts of "menstrual cycle"):
fertile period; fertile phase (the time in the menstrual cycle when fertilization is most likely to be possible (7 days before to 7 days after ovulation))
menstrual phase (the phase of the menstrual cycle during which the lining of the uterus is shed (the first day of menstrual flow is considered day 1 of the menstrual cycle))
luteal phase; secretory phase (the second half of the menstrual cycle after ovulation; the corpus luteum secretes progesterone which prepares the endometrium for the implantation of an embryo; if fertilization does not occur then menstrual flow begins)
safe period (that time during a woman's menstrual cycle during which conception is least likely to occur (usually immediately before of after menstruation))
Context examples:
Serum concentrations transit during the menstrual cycle.
(Inhibin A, NCI Thesaurus)