egg cell


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egg cell

the unfertilized oocyte.

egg cell

n.
See egg1.

egg cell

see OVUM.
References in periodicals archive ?
A fertilised egg cell is the start of every human life.
Our work challenges that dogma, held since early embryologists first observed mammalian eggs around 1827 and observed fertilisation 50 years later, that only an egg cell fertilised with a sperm cell can result in a live mammalian birth.
In this study, the scientists triggered unfertilized human egg cells into dividing.
One queen of the Q group which only had live cocoons in the cage managed to get into the cage and established a living egg cell on the cocoons.
The key to this success was finding a way to prompt egg cells to stay in a state called "metaphase" during the nuclear transfer process.
A key problem has been that human egg cells appear more fragile than those of other species.
By the early 20th century, fertilization researchers realized that the sperm cell not only delivers a haploid nucleus to the egg but also somehow signals or activates the egg cell to prepare for embryogenesis (in mammals, egg activation events include creation of the polyspermy block and completion of meiosis).
Scientists hope to fertilise the first human egg cells grown in a lab from stem cells later this year, it emerged yesterday.
An electric current acts as a trigger for the egg cell to start dividing as it grows like any normal embryo.
The researchers took bits of skin from the tails of mice, plucked out the nucleus of the skin cells, and inserted them into egg cells from other mice whose own nuclei had been removed.
This manufactured egg cell containing the patient's DNA is stimulated to divide for about 5 days to produce stem cells, which contain only the patient's DNA.
The latter procedure removes the nucleus of a somatic cell and transfers it to an enucleated egg cell.