Sentences with phrase «egg develops an embryo»

Step One: The Worm Egg Develops an Embryo Toxocara eggs are passed in the host's feces.

STEP ONE: THE WORM EGG DEVELOPS AN EMBRYO: Toxocara eggs are passed in the host's feces (if a fecal sample is tested, it is possible to detect the eggs and confirm roundworm infection).

Not exact matches

Definition of an egg: «In zoology, an egg is an organic vessel in which an embryo first begins to develop.

When the mature eggs, which have been retrieved from a woman's ovaries, have been successfully fertilized the resulting embryos begin to develop through rapid cell division.

At the moment an egg is successfully fertilized by a sperm, the embryo begins to develop and sends out signals to a woman's body to prepare her for pregnancy.

When the same sex intended parents are both female, the eggs from either one or both of the partners will be combined with the sperm from a sperm donor and develop into embryos.

When an egg is successfully fertilized by sperm, an embryo develops.

The egg is fertilized by a sperm then implanted in the in the lining of the uterus to develop to placenta and embryo, and later to fetus.

The report «The effects of cancer treatment on reproductive functions; guidance on management» recommends that a national policy on sperm, egg and embryo storage is needed and that funding bodies develop equitable funding protocols for patients.

This light allows you to take a closer look at the embryos inside the eggs as they develop.

Despite the time it took to develop a successful hESC - generating technique — and the interest in iPS cells as an egg and embryo - free alternative — Mitalipov's work is important.

Critics of the technique have always said that only a small fraction of donated eggs would develop in the required embryo - like way, leading to huge wastage.

The embryonic cells can develop into replacement organs in the lab or be injected into an egg, where they develop as a viable embryo and are literally born.

In parthenogenesis, an egg is prodded to develop into an embryo without fertilization.

Every embryo begins as a single fertilized egg, which develops into a human body consisting of trillions of cells, each one specialized to carry out specific functions.

When they removed the eggs» own chromosomes, the resulting embryos all stopped developing at the six to 12 cell stage.

Early opossum embryos develop for about 12 days, enclosed as shelled eggs in the womb.

In some species, the embryos eat the remaining eggs or even other embryos while still developing in the uterus.

At the July meeting of the European Society for Human Reproduction and Embryology in Madrid, scientists were horrified — and transfixed — by two presentations: one that explored adding cells to developing embryos and another that outlined a process of growing egg cells from aborted human fetuses.

In addition, the culture media in which the embryos are first developed in the laboratory have improved in quality, as have the hormonal medications used to help women produce a sufficient number of high quality eggs at the right time.»

Scientists managed to transfer the extinct frog's nuclei into the egg cells of a barred frog (right), but so far, the embryos have yet to fully develop.

Embryos that develop from fruit fly eggs lacking the normal amount of Oskar protein are unable to form germ cells — cells that allow reproduction — and so the resulting flies are sterile.

In a paper published Thursday in Science, researchers report that a 3 - meter - square chunk of rock they excavated contains 16 eggs with the fossilized bones of developing embryos.

«What these results demonstrate is that a relatively short dietary disruption in nutrients that are available can have an impact on the ovary, the quality of the egg that the ovary produces, and the quality of the embryo and placenta that the egg develops into after fertilization,» Diaz said.

The two sperm cells independently fertilize the egg cell and the central cell to produce the embryo and the endosperm (a tissue that surrounds and nourishes the embryo), respectively, which eventually develops into a seed.

And with that, he began prying away the granulosa cells clinging to the eggs, in order to get a better microscopic view of the nascent embryos to see if they were developing properly.

If you believe, for example, that granulosa cells and other very early features of ovarian ecology set up the polarities that ultimately determine the quality of a human egg, as Albertini does, then certain techniques widely used in IVF may be subtly perturbing the very mechanisms that eggs use to establish a plan to build an embryo and maximize the chances that it will develop properly.

Lei and Spradling also hypothesize that the transfer includes additional factors that «reprogram» the egg's chromosomes and give it the capacity to develop into an embryo.

Some worry that such human cells, when combined with animal embryos, could develop into brain cells, sperm, or egg cells in the chimeric offspring.

With coaxing and luck, the egg develops into a genetically identical embryo.

If the cells can be fertilized and develop into viable embryos, and if human ES cells turn out to have similar powers, such cells could allow researchers to get around some of the expense and ethical questions that arise from using donated eggs for therapeutic cloning experiments.

Thus far, the Newcastle team has worked with abnormally fertilized human eggs that will not develop into viable embryos; the new money will allow them to use normal, leftover eggs from IVF therapy.

For their part, the researchers believe that once they sort out the technical issues of getting an egg subjected to these IVF procedures to develop into a normal, viable embryo, the benefits of allowing a couple to have a healthy child far outweigh other risks or ethical concerns.

After egg laying at 25 °C, embryos were transferred to 29 °C to develop.

In particular, the research identified several genes regulated by methylation in the egg that are involved in cell adhesion and migration — both vital properties for cells of the developing placenta in establishing connections with maternal tissues to support embryo development.

These include in vitro editing of primordial germ cells that are subsequently transmitted through germ - line chimeras to produce genome edited offspring, and direct injections to developing embryos, creating germ - line chimeras in ovo (in the egg), which can then be bred to produce genome edited offspring.

Germ cells develop in the embryo and make up the reproductive system, eventually producing sperm in males and eggs in females.

By manipulating a specific gene in a mouse blastocyst — the structure that develops from a fertilized egg but is not yet an actual embryo — scientists with the University of Florida's McKnight Brain Institute and the Harvard Stem Cell Institute caused cells destined to build an embryo to instead change direction and build the cell mass that leads to the placenta.

This legislation is notable because the Swiss Constitution broadly prohibits research using human embryos and even sets controls over the number of eggs that may be fertilized and developed outside a woman's body during fertility treatments.

MRT replaces the mutated mitochondrial DNA in a fertilized egg or in an embryo with the healthy version provided by a third donor, which allows the mitochondria to develop normally.

So a fertilized egg can take several days to implant and begin growing in a woman's uterus, leading to initial hCG tests and ultrasound results that seem to indicate an embryo that is slow to develop and therefore likely to be miscarried.

Because a fertilized egg needs to grow in a uterus to develop into a fetus, women who have had their uterus removed can not carry an embryo.

In the meantime, your precious eggs become fertilized by the sperm and you sit and wait to see if the cells start to develop into an embryo.

Instead, the fresh egg is passed by the host in feces, develops into an infectious embryo in the environment, and is swallowed by the new host.

Depending egg age, exposure prevents embryos from developing, or disrupts larval development after hatching.

These eggs remain in the gravel throughout the winter and coho embryos develop.