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)
menstrual phase的用法和样例:
例句
Most modern women wear tampons during their menstrual periods. 最现代化的妇女在月经期佩带止血棉。
Such premenstrual tension as well as menstrual discomfort can often be alleviated by medication. 这种经前期紧张症和月经期不适通常能够用药物缓解。