fertilized egg


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Noun1.fertilized egg - an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval lifefertilized egg - an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
animal, animate being, beast, creature, fauna, brute - a living organism characterized by voluntary movement
blastosphere, blastula - early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
gastrula - double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm
morula - a solid mass of blastomeres that forms when the zygote splits; develops into the blastula
umbilical, umbilical cord - membranous duct connecting the fetus with the placenta
References in periodicals archive ?
I conjecture that the production of twin embryos depends on the flattening of the fertilized egg in the early development stages.
Their discovery shows how the hormone progesterone suppresses the growth of the uterus's lining so that a fertilized egg can implant in the uterus.
After conception it takes four to nine days for the fertilized egg to implant in the uterus, where the uterine nutrients enable life to begin.
A fertilized egg usually contains two pronuclei - genetic material from the egg and sperm - as well as mitochondria.
Two such recent examples include a referendum on the Colorado ballot this fall that would define a fertilized egg as a person, and a draft regulation of the U.
These embryos would use the genetic material from the nucleus of an ordinary fertilized egg (the yolk) but borrow a hollowed-out egg (the white) from another woman.
This leads some people to confuse a fertilized egg with a baby [and] religious considerations are easily added.
But the drug can also work by preventing the fertilization of an egg or by preventing a fertilized egg from attaching to the uterus.
These groups oppose abortion and also birth control because they believe God implants a soul in every fertilized egg at the moment of fertilization.
If a fertilized egg has already implanted in the uterus, Plan B has no effect and does not terminate the pregnancy.
The government and feminists maintain that the pill does not end a pregnancy; rather, they say, it prevents ovulation, fertilization, or the implantation of a fertilized egg in the uterus.
For dais to happen, these cells must first join their genetic material together to form a fertilized egg cell with a totally new and unique version of the human genome.