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  2. Egg cell - Wikipedia

    en.wikipedia.org/wiki/Egg_cell

    Studies performed on humans, dogs, and cats in the 1870s suggested that the production of oocytes (immature egg cells) stops at or shortly after birth. A review of reports from 1900 to 1950 by zoologist Solomon Zuckerman cemented the belief that females have a finite number of oocytes that are formed before they are born. This dogma has been ...

  3. Ovum quality - Wikipedia

    en.wikipedia.org/wiki/Ovum_quality

    Ovum quality is the measure of the ability of an oocyte (the female gamete) to achieve successful fertilisation.The quality is determined by the maturity of the oocyte and the cells that it comprises, which are susceptible to various factors which impact quality and thus reproductive success. [1]

  4. Oocyte - Wikipedia

    en.wikipedia.org/wiki/Oocyte

    An oocyte (/ ˈ oʊ ə s aɪ t /, oöcyte, or ovocyte is a female gametocyte or germ cell involved in reproduction. In other words, it is an immature ovum, or egg cell. An oocyte is produced in a female fetus in the ovary during female gametogenesis. The female germ cells produce a primordial germ cell (PGC), which then undergoes mitosis ...

  5. Zona pellucida - Wikipedia

    en.wikipedia.org/wiki/Zona_pellucida

    The zona pellucida is a translucent matrix of cross-linked glycoprotein filaments that surrounds the mammalian oocyte and is 6.5–20 μm thick depending on the species. Its formation, which depends on a conserved zona pellucida-like (ZP) module that mediates the polymerization of egg coat components, [2] is critical to successful fertilization. [3]

  6. Ovulation - Wikipedia

    en.wikipedia.org/wiki/Ovulation

    Ovulation is triggered by a spike in the amount of FSH and LH released from the pituitary gland. During the luteal (post-ovulatory) phase, the secondary oocyte will travel through the fallopian tubes toward the uterus. If fertilized by a sperm, the fertilized secondary oocyte or ovum may implant there 6–12 days later. [11]

  7. Ovarian stem cell - Wikipedia

    en.wikipedia.org/wiki/Ovarian_stem_cell

    In humans it is estimated that 500,000–1,000,000 primordial follicles ... Studies performed on humans, dogs, and cats revealed that oocyte production stops shortly ...

  8. Cumulus oophorus - Wikipedia

    en.wikipedia.org/wiki/Cumulus_oophorus

    As a follicle grows in size and the antrum develops, more layers of cumulus oophorus cells accumulate around the oocyte to aid in the acrosome reaction and sperm penetration into the oocyte. The proximity between the cumulus oophorus cells and the oocyte favors bidirectional communication, which is vital for oocyte development.

  9. Oocyte selection - Wikipedia

    en.wikipedia.org/wiki/Oocyte_selection

    Oocyte selection is a part the process for in vitro fertilization. [2] ... The size of an oocyte is another factor of the quality of the oocyte; Larger oocyte are ...