An excellent oocyte morphology has a spherical structure, surrounded by a uniform pellucid zone, with a homogeneous and translucent cytoplasm, free of inclusions, and with an appropriately sized polar corpuscle (Alpha Scientists in Reproductive Medicine & ESHRE Special Interest Group of Embryology, 2011)..
An oocyte is an immature egg (an immature ovum).
Oocytes develop to maturity from within a follicle.
These follicles are found in the outside layer of the ovaries.
During each reproductive cycle, several follicles begin to develop..
After a luteinizing hormone surge, the oocyte undergoes meiotic maturation and produces a secondary oocyte that arrests at metaphase II (MII).
During ovulation, the MII oocyte is released into the oviduct where on fertilization, meiosis is resumed and completed..
A follicle contains an oocyte.
An oocyte is an immature egg cell.
The oocyte will eventually break free from the follicle and travel down the fallopian tube – at which point it's called an egg (or ovum, if you're that way inclined)..
Oocyte Function
An oocytes function in reproductive biology is to fuse with sperm after fertilization, transform into an embryo, then a blastocyst, and undergo a process called implantation where it attaches to the wall of the uterus.
Once implantation occurs, the blastocyst becomes a developing fetus..
Oocytes within the ovary are arrested in prophase I of meiosis until the gonadotropins, follicle-stimulating hormone (FSH) and luteinizing hormone (LH), stimulate follicular growth and development, which then triggers the resumption of meiosis up to metaphase II..
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, forming oogonia.
During oogenesis, the oogonia become primary oocytes..
Oocytes are rich in cytoplasm, which contains yolk granules to nourish the cell early in development
Because the fate of an oocyte is to become fertilized and ultimately grow into a fully functioning organism
Female mammals and birds are born possessing all the oocytes needed for future ovulations
The spermatozoon that fertilizes an oocyte will contribute its pronucleus, the other half of the zygotic genome. In some species
• Nondisjunction—a failure of proper homolog separation in meiosis I, or sister chromatid separation in meiosis II can lead to aneuploidy
Immature ovum or egg cell
