oocyte

(redirected from Oocytes)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Oocytes: oogenesis, follicle, gametogenesis, Primary oocytes, Ovocyte

oocyte

 [o´o-sīt]
an immature ovum; it is derived from an oogonium, and is called a primary oocyte prior to completion of the first maturation division, and a secondary oocyte between the first and second maturation division.

o·o·cyte

(ō'ō-sīt),
Female gamete or sex cell. When fertilized by a sperm, an oocyte is capable of developing into a new individual of the same species; during matuation, the oocyte, like the sperm, undergoes a halving of its chromosomal complement so that, at its union with the male gamete, the species number of chromosome (46 in humans) is maintained; yolk contained in the oocytes of different animal species varies greatly in amount and distribution, which influences the pattern of the cleavage divisions.
See also: egg, ovum.
Synonym(s): ovocyte
[G. ōon, egg, + kytos, a hollow (cell)]

oocyte

/oo·cyte/ (-sīt) the immature female reproductive cell prior to fertilization; derived from an oogonium. It is a primary o. prior to completion of the first maturation division, and a secondary o. in the period between the first and second maturation divisions .

oocyte

(ō′ə-sīt′)
n.
A diploid cell from which an egg or ovum develops by meiosis. A primary oocyte divides to produce a polar body and a secondary oocyte, which divides again to produce the ovum and another polar body.

oocyte

[ō′əsīt]
Etymology: Gk, oon + kytos, cell
a primordial or incompletely developed ovum.

oocyte

Egg Histology The female reproductive or germ cell. Cf Sperm.

o·o·cyte

(ō'ŏ-sīt)
The female sex cell. When fertilized by a sperm, a gamete or zygote is capable of developing into a new individual of the same species; during maturation, the oocyte, like the sperm, undergoes a halving of its chromosomal complement so that, at its union with the male gamete, the species number of chromosomes (46 in humans) is maintained; yolk contained in the oocyte (ova in nonhuman species) varies greatly in amount and distribution, which influences the pattern of the cleavage divisions. In nonhuman females, the term is ovum.
[G. ōon, egg, + kytos, a hollow (cell)]

oocyte

A cell in the OVARY that undergoes MEIOSIS to produce an OVUM. In meiosis the 46 chromosomes are reduced to half the normal number (HAPLOID), so that the full complement can be restored by a haploid contribution from the sperm. Primary oocytes develop in the ovaries of the fetus but only a fraction of these will ever give rise to OVULATION. Secondary oocytes divide to form the mature OVUM but the second maturation division occurs only after the ovum has been fertilized by a sperm.

oocyte

an early stage in GAMETO GENESIS of female animals, ‘primary’ oocytes being DIPLOID (1) and ‘secondary’ oocytes HAPLOID (1) having undergone the first meiotic division. Human females are born with the primary oocytes already formed, which may increase the risk of NONDISJUNCTION of chromosomes. See also DOWN'S SYNDROME.

o·o·cyte

(ō'ŏ-sīt)
Female gamete or sex cell.
[G. ōon, egg, + kytos, a hollow (cell)]

oocyte

an immature ovum; it is derived from an oogonium, and is called a primary oocyte prior to completion of the first maturation division, and a secondary oocyte between the first and second maturation division.
References in periodicals archive ?
Prolonging the period of ovary collection may significantly affect the viability of the oocytes for IVEP.
Mean oocyte diameter per stage was estimated by randomly measuring five oocytes from each stage of development.
The oocytes in the clutch of late-mature (LMA) ovaries are yellow with transparent yolk containing large droplets of oil that are often but not always condensed near the nucleus.
Oocytes of HFD and CD dams and their female offspring were subjected to bisulfite treatment and PCR analysis as described previously (Ge et al.
Batch fecundity (BF), the total number of mature eggs produced in a single spawning batch by an individual female, was estimated by using the gravimetric method on the basis of the relation between ovary weight and the density of oocytes in the ovary (Hunter and Goldberg, 1980).
After about 21 h of culture with maturation medium, oocytes were cultured without hormones for another 21 h at 38.
Maturation in vitro of immature human oocytes for clinical use.
Automated microinjection setup for injecting DNA or RNA in oocytes placed in standard 96 or 384 multi-well plates.
Sesh Kamal Sunkara said Stimulation of less than 20 oocytes Didn't raise the risk of preterm birth.
Previous reports have shown that chemotherapy and radiation-treated oocytes are able to recover from DNA damage," Kim said.