Multifollicular ovaries are ovaries that contain more follicles than average, generally from 8 to 12 follicles measuring 4 to 10 mm in diameter. An ovarian follicle is the cavity in which the ovum forms before it is released. In a multifollicular ovary, follicles are not able to reach maturity and do not release the ovum (anovulation), due to a dysfunctional hypothalamus that does not secrete the required hormones. The principal symptom is the absence of periods. This condition is generally temporary, common during puberty or occurring because of certain contraceptive methods.