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What is a mature follicle

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In the ovaries of the female reproductive system, an ovarian follicle is a fluid-filled sac that contains an immature egg, or oocyte. A normal, mature follicle that is ready to ovulate and conceive is 18 to 30 millimeters in diameter. During a regular menstrual cycle, several different follicles begin to enlarge and mature, but only one follicle can complete the maturation process each month. The steps and timing of human folliculogenesis are shown in fig. 1,2,3 in each menstrual cycle, the dominant follicle that ovulates its egg originates from a primordial follicle that was recruited to initiate growth almost 1 year earlier (fig.). To determine the moment when each follicle of 15mm or more produces a mature egg, doctor takes a final injection, that is called hcg. For the first 36-40 hours after the hcg shot is taken, the larger eggs will go through their final maturation process. The haploid oocyte, produced by the first meiotic division, a process which is being continued as the developing ovarian follicle transforms from the secondary follicle to the mature follicle vesicular follicle graafian follicle (meiosis division i will not reach completion until ovulation) it retains the bulk of the cytoplasm while the. Graafian follicle a fluid-filled, spherical vesicle 1 in the ovary of a mammal, graafian follicle (grah-fi-n) n. Diagram how estrogen is produced by cells of the theca interna and zone the graafian follicle is the stage after the first meiotic division has completed but. Graafian follicle definition is - a mature liquid-filled cavity in a mammalian ovary that ruptures during ovulation to release an egg.

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