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  2. 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.

  3. Oogenesis - Wikipedia

    en.wikipedia.org/wiki/Oogenesis

    By definition it means, to recapitulate mammalian oogenesis and producing fertilizable oocytes in vitro.it is a complex process involving several different cell types, precise follicular cell-oocyte reciprocal interactions, a variety of nutrients and combinations of cytokines, and precise growth factors and hormones depending on the ...

  4. Oocyte selection - Wikipedia

    en.wikipedia.org/wiki/Oocyte_selection

    Oocyte selection is a procedure that is performed prior to in vitro fertilization, in order to use oocytes with maximal chances of resulting in pregnancy. In contrast, embryo selection takes place after fertilization.

  5. Immature ovum - Wikipedia

    en.wikipedia.org/wiki/Immature_ovum

    Primary oocytes have been created in late fetal life. This is the stage where immature ova spend most of their lifetime, more specifically in diplotene of prophase I of meiosis. The halt is called dictyate. Most degenerate by atresia, but a few go through ovulation, and that's the trigger to the next step.

  6. Ovulation - Wikipedia

    en.wikipedia.org/wiki/Ovulation

    Approximately 1–2% of ovulations release more than one oocyte. This tendency increases with maternal age. Fertilization of two different oocytes by two different spermatozoa results in fraternal twins. [10] The precise moment of ovulation was captured on film for the first time in 2008, coincidentally, during a routine hysterectomy procedure.

  7. In vitro maturation - Wikipedia

    en.wikipedia.org/wiki/In_vitro_maturation

    In vitro maturation (IVM) is the technique of letting the contents of ovarian follicles and the oocytes inside mature in vitro. It can be offered to women with infertility problems, combined with In Vitro Fertilization (IVF), offering women pregnancy without ovarian stimulation. Follicular Development

  8. Vitellogenesis - Wikipedia

    en.wikipedia.org/wiki/Vitellogenesis

    Vitellogenesis is the process of yolk protein formation in the oocytes during sexual maturation. [2] The term vitellogenesis comes from the Latin vitellus ("egg yolk"). Yolk proteins, such as Lipovitellin and Phosvitin, provides maturing oocytes with the metabolic energy required for development.

  9. Oocyte activation - Wikipedia

    en.wikipedia.org/wiki/Oocyte_activation

    Oocyte (or ovum/egg) activation is a series of processes that occur in the oocyte during fertilization. Sperm entry causes calcium release into the oocyte. In mammals, this is caused by the introduction of phospholipase C isoform zeta (PLCζ) from the sperm cytoplasm. [1] Activation of the ovum includes the following events: