Sentences with phrase «egg cells with»

Also, the fertility of women with this blood type is reduced by having less egg cells with poorer quality.

The images depict what might be called embryology in flagrante: micrographs of sperm cells, trailing accordion - like pleats of white zags as they streak across a vast blue ocean of ooplasm; a multihued blastocyst in the process of hatching out of the egg's zona pellucida; and egg cells with a fringe of glowing, fate - determining proteins, looking a bit like a solar eclipse inside a cell.

The «pro-life» literature is mostly a string of verbally implied identifications of fertilized egg cell with fetus, of fetus with infant, infant with child, child with youth, yotith with adult.

Experts take the cell nucleus of one human egg cell whose mitochondria have a defect and place it in an egg cell with «healthy» mitochondria.

In the second stage of meiosis, the single pairs of chromosomes — two sister chromatids joined in the middle — separate and the egg cell divides again in the same way, leaving a single mature egg cell with one copy of each chromosome.

Scientists can replace the mitochondria of the mother's egg cell with mitochondria from a healthy donor.

Not exact matches

One way to enhance eggs, developed by the company OvaScience, involves supplementing an egg with mitochondria taken from stem cells found in the lining of a woman's uterus.

After the woman's eggs have been retrieved through the normal IVF protocol and are ready for fertilization, the mitochondria taken from her stem cells are injected into an egg along with a sperm cell.

Meanwhile, the February 2 issue of the New Scientist noted the work being done with stem cells to create «female sperm» and «male eggs.»

It is far more likely, however, that the egg - cell cytoplasm with its stripping factor will reprogram all the genetic material including the alterations made in the donor nucleus that were intended to prevent the creation of the zygote.

OAR proponents claim that when the altered donor - cell nucleus with its activated nanog gene is transferred to the enucleated oocyte (egg cell), the presence of nanog will immediately convert the enucleated egg cell to a pluripotent cell, without ever forming a zygote.

A clump of cells with no brain, and no neural tube is no more «a human life» than cells from your skin layer, or a sperm cell with no change of fertilizing an egg.

Unlike the controversial method of tissue harvesting that requires some human embryos to be destroyed, the new cloning technique can use a patient's own skin cells — combined with an unfertilized human egg — to create tissue with a DNA match.

A single human egg cell is alive, but it has no experiences like those of an adult, or a child, or even of an animal with a central nervous system.

Certainly the potential is there, but as I've said before, the potential is there with every egg cell, every sperm cell.

The first page of Larsen's Human Embryology states that, `... [W] e begin our description of the developing human with the formation and differentiation of the male and female sex cells or gametes [sperm and egg], which will unite at fertilisation to initiate the embryonic development of a new individual».

The «Puffle» cones are crafted from gai daan jai, which translates to «little eggs,» — a fluffy, eggy waffle with semi-spherical cells — with a number of English interpretations (bubble waffles, eggettes, and Hong Kong cakes, just to name a few).

When you or your child comes in contact with egg proteins, immune system cells (antibodies) recognize them and signal the immune system to release histamine and other chemicals that cause allergic signs and symptoms.

Frankenbunnies Embryos made by Chinese researchers who fused human skin cells with rabbit eggs, hoping to create a source of stem cells.

But while chemotherapy and radiation are associated with temporary changes, such as hair loss and tissue swelling, the treatments can have an unseen, permanent effect: infertility due to irreparably damaged sperm or egg cells.

Both involve a technique called nuclear transplantation — replacing the nucleus of a donor's egg with the DNA from an adult cell.

For many people, the fear of a class of genetically enhanced people is reason enough not to tinker with the DNA of the human germline — eggs, sperm, embryos and the cells that give rise to eggs and sperm.

This ancient theory, recounted by Pliny the Elder, is one of the many bizarre early attempts to explain one of life's greatest mysteries — how a nearly uniform egg cell develops into an animal with dozens of types of cells, each in its proper place.

Asexual whiptails have a special trick for making spermless reproduction work: The egg cells in other animals first double their choromosomes once and then divide twice, leaving them as haploid cells, with half the normal number of genetic material.

Fertile eggs have been created from mouse skin cells for the first time, raising the prospect of new fertility treatments and babies with two genetic fathers

But the whiptails» egg cells first double their chromosomes twice and then divide twice, leaving them with the normal number of chromosomes and rendering a sperm cell unnecessary.

Combining an egg's genetic leftovers with donor cells may be a way to double the number of eggs available for IVF in women whose ovarian reserve is running low

He and Bonomo compared the efficacy of the egg - based vaccine with an experimental vaccine produced from insect cells via reverse genetics.

They made these clones by a process called automatic parthenogenesis: The egg is formed normally (with half the species» usual number of chromosomes), then fertilized by the «polar body,» a cell that is created during oogenesis and contains the same gene copies as the egg, resulting in the shark having half the genetic variation of its mother.

Two sperm cells from the same father apparently fused with the egg, which then split in the same way that typical identical twins come about.

Female mammals are born with millions of dormant eggs, but only a small fraction ever mature into cells with reproductive potential.

In the paper, published in the now - defunct online journal e-biomed, West, Lanza and their colleagues showed that they could pull a nucleus from a human egg cell, replace it with a whole adult ovarian cell and generate an embryo that divided into six cells.

«More women are postponing childbearing, but with age, the cumulus cells that surround and nurture the eggs begin dying; we've found that this is caused by lack of oxygen,» said senior author Pasquale Patrizio, M.D., director of the Yale Fertility Center and professor in the Department of Obstetrics, Gynecology & Reproductive Sciences.

Thawing caused ice crystals to form and prevented meiosis, the cellular process during which an egg's chromosomes split up from 46 to 23, to be united later with 23 chromosomes from a sperm cell.

The last piece of evidence together with the fact that the parents do not carry the alterations suggest that the extra copies of genes may have occurred either in the sperm or the egg, the parent's germ cells, and before or very early after fertilization.

«Ladies, this is why fertility declines with age: Age - related female infertility explained by a defect in the choreography of chromosome sharing during cell division in eggs before they are fertilized.»

«But if we make a mother centriole stay in the cell, it doesn't get destroyed, so the fertilised egg ends up with a tripolar spindle and can't divide.»

The film depicts several sperm attempting to fertilize the egg, «zooms in» on one sperm's tail to show how the dynein proteins move in sync to cause the tail to bend and flex, and ends with the sperm's successful journey into the egg and the initiation of cell division that will ultimately create a new organism.

They selected cells that had taken up the DNA and placed them in contact with cow eggs whose nuclei had been removed.

Jonathan Tilly and colleagues at Massachusetts General Hospital in Boston first challenged the idea that mammals are born with a limited supply of eggs back in 2004, when they found evidence for ovarian stem cells in...

By injecting specialized trout sex cells into sterilized but otherwise healthy salmon embryos, Japanese scientists wound up with male salmon that ejected trout milt (semen) and female salmon bearing trout eggs.

The bees lay eggs and then fill the cells with a liquid called larval food.

The researchers zapped each egg and fetal cell with electricity to get them to fuse, then added a chemical mixture that inhibits enzyme activity to jump - start the biochemical machinery that produces an embryo.

At fertilization, sperm delivers a structurally distinct genome, along with a complement of ribonucleic acids, or RNAs, and proteins to the immature egg cell.

The resulting cells are themselves fused with other enucleated egg cells.

The cells were derived from eggs that had been injected with DNA from the patients, so they could eventually be transplanted back to replace or correct the patient's diseased cells without fear of immune rejection.

Although the bulk of the commercial manufacturing uses cultures of bacteria, such as Escherichia coli or Chinese hamster ovary cells, a few biotech companies are trying to produce therapeutic proteins in the milk of transgenic mammals (such as GTC Biotherapeutics, which is using goats; PPL Therapeutics, which is using sheep; and BioProtein Technologies, which is working with rabbits), transgenic chicken eggs (such as Avigenics or Vivalis), or even in transgenic crops (such as ProdiGene or Meristem Therapeutics); but it is early days for these «pharming» methods.

In the initial work at the Roslin Institute, the egg cells along with their transplanted nuclei were then implanted directly into a foster mother, where they developed and, in the case of Dolly, resulted in a viable offspring.

«Before we get too excited about this being a new form of infertility treatment, these cells can not as yet be made into functioning sperm, so we have no idea if they can pass «the acid test» — the ability to fertilise female eggs as is achieved with donor sperm in IVF treatment,» says Malcolm Alison of the London School of Medicine and Dentistry in the UK.

The method, called somatic cell nuclear transfer (SCNT), replaces the DNA in an egg cell's nucleus with the genetic material from the nucleus of a skin cell, then tricks the egg cell to start dividing as if it had been fertilized with sperm.