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follicular phase

fol·lic·u·lar phase

/fuh lik yuh ler fāz/

Noun

The stage in the menstrual cycle in which estrogen is released from the developing follicles in the ovary, which stimulates the growth of the endometrium. Its blood vessels and glands begin to develop all over again. It is also called the preovulatory, proliferative or estrogen phase.