An embryo (irregularly from Greek: ἔμβρυον, plural ἔμβρυα, lit. "that which grows," from en- "in" + bryein, "to swell, be full"; the proper Latinate form would be embryum) is a multicellular diploid eukaryote in its earliest stage of development, from the time of first cell division until birth, hatching, or germination. In humans, it is called an embryo until about eight weeks after fertilization (i.e. ten weeks after the last menstrual period or LMP), and from then it is instead called a fetus.

The development of the embryo is called embryogenesis. In organisms that reproduce sexually, once a sperm fertilizes an egg cell, the result is a cell called the zygote, which possesses half the DNA of each of its two parents. In plants, animals, and some protists, the zygote will begin to divide by mitosis to produce a multicellular organism. The result of this process is an embryo.

Read more about Embryo:  Animal Embryos, The Human Embryo, Plant Embryos

Other articles related to "embryo, embryos":

Human Embryogenesis
... process of cell division and cellular differentiation of the human embryo that occurs during early stages of development ... through the development of the early embryo, up until the time of implantation ... In humans, the embryo is referred to as a fetus in the later stages of prenatal development ...
Plant Embryos
... Further information Sporophyte In botany, a seed plant embryo is part of a seed, consisting of precursor tissues for the leaves, stem (see hypocotyl), and root (see radicle), as well as one or more cotyledons ... Once the embryo begins to germinate — grow out from the seed — it is called a seedling ... Plants that do not produce seeds, but do produce an embryo, include the bryophytes and ferns ...
Lateral Nasal Prominence - Additional Images
... Under surface of the head of a human embryo about twenty-nine days old Head end of human embryo of about thirty to thirty-one days Same embryo as shown in Fig ...
Cytoplasmic Transfer - Candidates
... mitochondria can lead to recurrent implantation failure, high levels of embryo fragmentation and overall poor embryo development ... for couples or women who wish to genetically contribute to any resulting embryo, given cytoplasmic transfer does not interfere with the primary nuclear DNA input from the recipient egg ...
Snowflake Children - Criticism of The Term
... Members of the Nightlight Christian Adoptions, the Embryo Adoption Awareness Campaign, and Embryos Alive Adoption Agency use the term "snowflake baby" as a synonym for any embryo that has ... However, that use of the term, and the related term "embryo adoption," are at times controversial in some circles ...

Famous quotes containing the word embryo:

    Even in civilized communities, the embryo man passes through the hunter stage of development.
    Henry David Thoreau (1817–1862)