secondary oocyte

secondary oocyte
secondary oocyte n an oocyte that is produced by division of a primary oocyte in the first meiotic division

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an oocyte in the period between the first and second maturation division; it is derived from a primary oocyte shortly before ovulation by a division that splits off the first polar body. If fertilized, it divides into an ootid and the second polar body; otherwise it perishes. In humans, it is a round cell about 0.1 mm in diameter, and consists of protoplasm that contains some yolk, enclosed by a thin cell wall, the vitelline membrane. It is surrounded by the zona pellucida and corona radiata.

Medical dictionary. 2011.

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  • secondary oocyte — secondary oocyte. См. ооцит второго порядка. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • secondary oocyte — See: oocyte …   Glossary of Biotechnology

  • Oocyte — Stripped human oocyte; granulosa cells that had surrounded this oocyte have been removed. Gray s subject #3 38 …   Wikipedia

  • oocyte — The immature ovum. SYN: ovocyte. [G. oon, egg, + kytos, a hollow (cell)] primary o. an o. during its growth phase and before it completes the first maturation division. secondary o. an o. in which the first meiotic division i …   Medical dictionary

  • oocyte — The egg mother cell; it undergoes two meiotic divisions (oogenesis) to form the egg cell. The primary oocyte refers to the state before completion of the first meiotic division; the secondary oocyte after completion of the first meiotic division …   Glossary of Biotechnology

  • oocyte — n. a cell in the ovary that undergoes meiosis to form an ovum. Primary oocytes develop from oogonia in the fetal ovary as they enter the early stages of meiosis. Only a fraction of the primary oocytes survive until puberty, and even fewer will be …   The new mediacal dictionary

  • oocyte donation — the transfer of oocytes from one woman to another. Possible recipients include women with primary or secondary ovarian failure or severe genetic disorders, and women in whom ovulation has been suppressed as an incidental result of drug treatment… …   Medical dictionary

  • oocyte donation — egg donation the transfer of secondary oocytes from one woman to another. Possible recipients include women with primary or secondary ovarian failure or severe genetic disorders, and women in whom ovulation has been suppressed as an incidental… …   The new mediacal dictionary

  • primary oocyte — The enlarging ovum before maturity is reached, as opposed to the secondary oocyte or polar body …   Dictionary of molecular biology

  • Transvaginal oocyte retrieval — (TVOR), also referred to as oocyte retrieval (OCR) or even simply egg collection, is a technique used in in vitro fertilization (IVF) in order to remove oocytes from the ovary of the female, enabling fertilization outside the body.[1]… …   Wikipedia

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