Sentences with phrase «old embryo»

When it was over, she was oblivious to the idea that I might grieve the loss of a 6 - week old embryo.

They believe that taking a cell from an adult and converting it all the way back to the way it was when that person was a 6 - day - old embryo has the opportunity to greatly advance the understanding of how cells age and what happens when things go wrong, as in cancer development.

Although they seem to be identical, the cells of the two day - old embryo are already beginning to display subtle differences.

The problem is that they are created in an 8 - week - old embryo.

Traditionally, the process involves plucking the inner cell mass from a 5 - day - old embryo known as a blastocyst (a round ball of 150 to 200 cells the size of a grain of sand), which destroys the embryo.

Your newly tender, swollen breasts have been preparing for your pregnancy since you were a 6 - week - old embryo in your own mother's womb.

They seem to have more respect for an 8 day old embryo than an 8 day old baby.

Unlike late - term abortions, where there are clearly two human beings involved, there is no such agreement regarding, say, a six - week - old embryo.

Wells and his colleagues are the first to use CGH in 5 - day - old embryos, which have the advantage of containing chromosomes from both parents and having several hundred cells.

Embryos are currently selected on the basis of appearance, while some 3 - day - old embryos are also screened using pre-implantation genetic diagnosis (PGD), in which a cell is removed from the embryo and the chromosomes examined by staining them using a technique called fluorescence - in - situ - hybridisation (FISH).

The process, reported in Human Reproduction, utilizes DNA fingerprinting (an assessment of active genes in a given cell) to boost the success rate of IVF and lower the chances of risky multiple births by identifying which of several five - day - old embryos are most likely to result in pregnancy The new method, which will replace unproved alternatives such as choosing embryos based on their shape, is likely to up the success of women becoming pregnant and lower their chances of having multiple births.

The scientists converted these cells to a status last experienced when they were part of six - day - old embryos.

Two of the eggs became 5 - day - old embryos, or blastocysts, that were clones of the male donors.

Next, the researchers labeled cells in 3 - day - old embryos and followed where they wound up in the chick.

His group began with 242 eggs, but after removing the eggs» nuclei and swapping in those of somatic cells, the investigators produced only 30 blastocysts (week - old embryos), from which they coaxed just one stem cell line into being.

On 14 January, a regulatory committee in the United Kingdom will evaluate a request to knock out development genes in day - old embryos.

But days - old embryos have been destroyed to obtain the cells, which some critics consider immoral.

In the early 1950s, Robert Briggs and Thomas King repeated Spemann's experiments using a species of leopard frog, Rana pipiens, first with a nucleus from young embryos (Briggs and King, 1952) then from older embryos (King and Briggs, 1954); both the younger and older implanted nuclei could still be reprogrammed by the enucleated host cell.

The researchers gingerly placed each of the remaining 2 - day - old embryos into a dish on a special microscope.

They are derived from days - old embryos that are developed in a laboratory.

Not exact matches

Christian positions on embryos «Oh its human», Christian positions on guns that killed 6 - 7 years old's is: «Oh, we are not sure where we stand there».

Any mother that does not want her one year old can give it up for adoption, and any mother wanting an abortion can have the embryo vacuumed out and also give it up for adoption.

You can't trust me, you can't trust Ryan (he's just goofy and advocates the slaughter of innocent animals by a ten year old girl while holding dear, the unborn embryos) and know you REALLY can't trust Romney!

But genetic screening for acceptable embryos or engineering for enhanced genetic configurations may lead to such an emphasis on the perfect child that children born the old - fashioned way may be led to feel inferior.

From Valencia to Southampton via Gillingham: Argentine «keeper Paulo Gazzaniga has already had a strange and eventful career and, at 20, is a positive embryo in goalkeeping years (just ask 78 - year - old Brad Friedel).

I felt that a 7 - week old baby could still be miscarried and it was kind of a pointless exercise to look at it dancing around in my womb, although I was amazed to see how human such a little embryo really was.

In an attempt to curb the chance of multifetal gestations, the American Society for Reproductive Medicine revised their recommendations regarding the number embryos that should be transferred to women younger than 35 years old with favorable prognoses.

These 70 - million - year - old eggs still contain embryos.

The Dawn of the Deed By John A. Long When paleontologist Long spotted a set of tiny bones inside a 380 - million - year - old fossilized fish, he not only discovered the oldest known embryos, he also found the earliest known evidence of animals copulating directly, rather than releasing sperm and eggs to meet in the open sea.

A better way of interpreting the old experiments, he and his colleagues suggest, is that the embryos died because pha - 1 wasn't providing the antidote to the sup - 35 toxin.

When the nursing joey reaches 200 days old, development of the embryo restarts; a day before birth, the mother kicks the older joey of out her pouch to make space for its younger sibling.

In these instances, the committee says, the use of existing embryonic cell lines derived from embryos fewer than 14 days old should be considered before resorting to the use of cells taken from surplus in vitro fertilization embryos fewer than 14 days old.

Schweitzer placed the remains under scanning electron and atomic force microscopes and concluded that the 70 - million - year - old eggs still held embryos containing intact collagen.

Satellites have detected intense x-rays blazing from the youngest stellar embryo yet seen, an object perhaps 10,000 years old.

Where permitted, ES cells should be drawn from sources in the following order: (1) existing ES cell lines, originating from ES cells derived from embryos less than 14 days old; and (2) surplus human embryos less than 14 days old that were created for fertility treatment.

If the genes in the chick embryo are very close to those of an ancestral, nonavian dinosaur — and if the changes, over more than 150 million years, have been almost all in regulation of the genes — then we could reactivate the old pattern of regulation.

Culled from embryos barely 4 or 5 days old, these cells are versatile shape - shifters that can mature into any type of cell in the body — a trait that's made them crucial to research.

And with CRISPR, they're able to break genes in up to 75 percent of Parhyale embryos, versus a maximum 25 percent success rate with the old technique.

The eggs not only contained the oldest and best - preserved dinosaur embryos ever found but also offered the earliest evidence yet that dinosaurs may have nurtured their young.

THERE»S an old American expression that goes something like this: you can't do embryo research without breaking some eggs.

The researchers extracted mammary buds, the early developing form of the mammary gland, from 14 - day - old mouse embryos, which is a critical time for mammary development in rodents, according to Speroni.

The 33 - year - old Suleman already had six children, and her physician implanted her with six embryos, two of which split into twins.

They injected a mutant gene for a cell - surface receptor for bmp into the right legs of two - day - old chicken embryos.

The question is how: by passing a new law, or by modifying Dickey - Wicker, a 14 - year - old law banning federal research that destroys embryos.

The reprogrammed skin cells that have led to this enthusiasm seem to have the same properties as the embryonic stem cells (ESCs) found in human embryos just a few days old.

They hope to continue the project — monitoring developments as the children who resulted from adopted embryos become older.

For her thesis, Warkentin caged cat - eyed snakes (Leptodeira annulata) with clutches of 5 - day - old frog eggs and found that the embryos could hatch to escape.

Further experiments with eggs from Panama showed that embryos as young as 4 days old could accomplish the same feat.

(When the eggs are about 4 days old, she abandons the forceps — she can shake the embryos out instead.)

The world's first chimeric monkeys were created in a laboratory last year, and they offer surprising new insights into embryonic stem cell therapy: One reason for often - poor treatment outcomes may be that we're using embryos that are, strangely, just too old.