menstrual cycle

Từ điển WordNet v3.1 - WordNet Dictionary

noun

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
- the average menstrual cycle is 28 days
• Hypernyms:
cycle, oscillation
• Part Meronyms:
fertile period, fertile phase, menstrual phase, secretory phase, luteal phase, safe period