The maturation of ova in the female.
The formation and development of ova.
The production of oocytes by the ovary of the female.
Development of ova, female reproductive cells. During the reproductive years of a woman’s fife, at roughly monthly intervals, one or two oocytes present in the ovary since birth undergo a series of meiotic divisions that lead to the formation of a mature ovum (ova). The mature ovum has the haploid chromosome number and is released from the Graafian follicle at the time of ovulation, ready for fertilization.
The process by which mature ova (egg cells) are produced in the ovary. Primordial germ cells multiply to form oogonia, which start their first meiotic division to become oocytes in the fetus. This division is not completed until each oocyte is ovulated. The second division is only completed on fertilization. Each meiotic division is unequal, so that one large ovum is produced with a much smaller polar body.
The developmental process by which the mature human ovum (the female reproductive cell) is formed. Formation begins during the first 3 months of female embryonic fife with the development of ovarian follicles. Each follicle contains one oogonium which, through the process of mitosis, becomes a primary oocyte containing 46 chromosomes. The oocyte then undergoes the first meiotic reduction division, resulting in formation of a secondary oocyte and a polar body, each containing 22 autosomes (half the number of chromosomes that are found in nongerm cells) and one X heterosome. Further division is arrested in prophase until the female reaches puberty. The second meiotic division begins at ovulation and reaches metaphase’ where, once again, division is arrested until the ovum is fertilized. The second meiotic division is completed at fertilization, ending with formation of the mature haploid ovum and one polar body.
The method through which mature egg cells (referred to as ova) are formed in a female’s ovary is integral. From the moment of birth, a female possesses the complete set of oogonia for her entire life. These cells undergo meiosis division, first evolving into oocytes, and ultimately maturing into ova.