a stage of the menstrual cycle, from onset of menstruation to ovulation.
Compare luteal phase.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
The phase during which the ovarian follicle develops during the menstrual cycle.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.