Sentences with phrase «of all fertilized eggs do»

30 - 50 % of all fertilized eggs do not implant naturally.

Not exact matches

When you consider the billions of fertilized eggs that never implanted or failed to thrive after implantation, you have to realize that nature (or god) does not hesitate to allow those potential people to be discarded en mass in the process of procreation.

A fertilized human egg cell does not contain a homunculus, but neither is it a structureless drop of viscous liquid.

And for an interesting look at the problem of categorizing the pill as an abortifacient, check out Libby Anne's piece on the topic, where she notes that «if your goal is to save «unborn babies,» and if you truly believe that a zygote — a fertilized egg — has the same value and worth as you or I — the only responsible thing to do is to put every sexually active woman on the pill,» because the pill actually reduces the number of zygotes naturally rejected by a woman's body.

Don't attempt to create theocratic legislation where a law is based on some supernatural claim of an immortal soul that is magically created when an egg is fertilized.

Does it not make the fertilized egg the legal and moral peer of a woman?

An ectopic pregnancy is a pregnancy in which the fertilized egg doesn't implant in the wall of the uterus as it should.

Conjoined twins form when your fertilized egg does not split completely into two separate balls of cells.

If the egg is not fertilized, it doesn't attach to the wall of the uterus.

But like the medieval alchemists, today's cloning and stem cell biologists are working largely with processes they don't fully understand: What actually happens inside the oocyte to reprogram the nucleus is still a mystery, and scientists have a lot to learn before they can direct a cell's differentiation as smoothly as nature's program of development does every time fertilized egg gives rise to the multiple cell types that make up a live baby.

To do so, a team led by neuroscientist David Holtzman of Washington University in St. Louis injected genes for human apoE3 or apoE4, which is about a third as common, into fertilized mouse eggs.

He tried fertilizing a mouse egg by injecting genetic material from another female mouse, but it didn't work: None of the mice without any male genes developed to term.

Attracted by the «big questions» of how an organism grows from a fertilized egg into a creature with specialized body parts, he did a 3 - year postdoc with Harvard biophysicist Walter Gilbert, already a Nobel laureate, and neurobiologist H. Robert Horvitz at the Massachusetts Institute of Technology, who just won his Nobel Prize this month.

«Till death do us part» — for marine bristle worms, these words are invariably true: Shortly after mating, the parent worms die, leaving thousands of newly fertilized eggs to develop in the water.

This doesn't achieve much in terms of controlling toad populations, because a single male can fertilize the clutches of many females — so the few lucky males that are left behind may have a pretty exciting life, and the number of fertilized eggs laid in that pond isn't reduced at all.

disrupting the ability of the cilia (whip - like cells that line the fallopian tube) to move a fertilized egg toward the uterus in the event that conception does occur;

Outside of that, we don't have this beautiful flow of hormones that need to be present to have that — that sperm fertilize that egg and to have it stick.

What can be done to insure that sufficient progesterone will be there to optimize the survival of the fertilized egg?

The devices kill sperm before they can fertilize an egg, and the contraceptives do so with high rates of success.

Up to half of all fertilized eggs naturally don't implant in the uterus — they pass out of your body during your period.

If your egg doesn't meet up with sperm, or a fertilized egg doesn't implant in your uterus, the thick lining of your uterus isn't needed and it leaves your body during your period.