An embryo is the earliest stage in the development of a fertilised egg (the zygote). It is the term used for any animal or plant, from the first cell division...

difficulty getting pregnant. In embryo transfer, embryos are placed in a woman's uterus. The goal is to create a pregnancy. The embryos can be either fresh or...

a new organism. The ovum is fertilized inside the female body, and the embryo then develops inside the uterus, being fed by the mother's placenta. The...

container for the zygote. It protects the zygote, and feeds the embryo. The animal embryo develops until it can survive on its own, at which point the egg...

form the group. Their seeds have three parts: (1) an embryo, (2) a supply of nutrients for the embryo, and (3) a seed coat. They are also called spermatophytes...

contrasted with the protostomes. Deuterostomes are distingued by their embryo: in deuterostomes, the first opening (the blastopore) becomes the anus,...

is the carrying of an embryo or fetus inside a female viviparous animal, until its birth. Mammals can have more than one embryo or fetus at the same period...

such as the Placozoa. The Eumetazoa have true tissues, neurons, and an embryo that goes through a gastrula stage. Ctenophora ParaHoxozoa Wikispecies has...

notochord is a flexible, rod-shaped body found in embryos of all chordates. It forms the axis of the embryo. In some chordates, it persists throughout life...

are contrasted with the deuterostomes. Protosomes are distingued by their embryo: in deuterostomes, the first opening (the blastopore) becomes the anus,...

nervous system in vertebrates. Chick embryo of thirty-three hours’ incubation, viewed from the dorsal aspect. X 30. Embryo between eighteen and twenty-one...

reserve tissue inside the seeds of most flowering plants. It surrounds the embryo and provides nutrition in the form of starch. It may also have oils and...

Monocotyledons are a class of flowering plants (angiosperms), whose embryo (seed) store only one cotyledon. The APG II system recognises a clade called...

human is called an embryo for the first eight weeks of the pregnancy, and foetus for the rest of the pregnancy. Abortion causes the embryo or foetus to die...

An ectopic pregnancy is a when an embryo sticks to somewhere outside the uterus. In a normal pregnancy, the embryo sticks itself into the wall of the uterus...

on one side begin to move in and form a two-layered embryo. It develops into a three-layered embryo with endoderm, mesoderm, and ectoderm. Ectoderm develops...

and the eggs develop inside the mother. The key idea is that the growing embryo gets its nutrition from a placenta in the mother's womb. It is the standard...

A typical seed includes three basic parts: (1) an embryo, (2) a supply of nutrients for the embryo, and (3) a seed coat. There are many different kinds...

and the Sauropsida (all reptiles, including dinosaurs and birds). The embryos of amniotes are either laid as eggs or develop in the female. These embyros...

specifically focuses on the patterning which occurs in the early Drosophila embryo. In 1995, Wieschaus shared the Nobel Prize in Physiology or Medicine with...

stem cells, and adult stem cells found in adult tissues. In a developing embryo, stem cells can differentiate into all of the specialised embryonic tissues...

bones formerly in the lower jaw have become the ear ossicles. hednk-023—Embryo Images at University of North Carolina Wikimedia Commons has media related...

Gastrulation is a phase early in the development of most animal embryos. In it, the embryo is dramatically restructured by cell migration. Gastrulation varies...

with notochords. These are rods of tissue that form inside the developing embryo. In many organisms, the notochord helps the spine or nervous system grow...

the development of the embryo, starting from the zygote (fertilised egg). Organisms can differ drastically in the how embryo develops, especially when...

may be flexible or calcareous (hard). The eggs contain all the food the embryo needs to develop into a hatchling. As a result, the amphibian's larval stage...

in a baby at birth, or which develops in the first month of life (as an embryo) or in pregnancy. The term is neutral as to whether the cause is genetic...

produce a male). The other acts after fertilisation by selecting only male embryos to develop. The Ericsson method uses the extra weight of sperms carrying...

middle ear and the inner ear. Studies have shown that ear bones in mammal embryos are attached to the dentary, which is part of the lower jaw. These are...

inner cell mass. This will form the embryo. The outer layer of cells will form the two membranes which surround the embryo. In humans, the blastocyst starts...

conception. Biologists call a fertilized egg a zygote. A zygote grows into an embryo. Fertilization occurs in animals, including humans and birds, in plants...

Embryology is the study of embryos and their development. The study of embryology starts with the fertilisation of an egg, and continues until the foetus...

make haploid eggs. Water moves the sperm to the egg. An embryo is made when they join. This embryo is diploid. It grows a tall stalk from the gametophyte...

Preimplantation genetic diagnosis (PGD) is a way of checking embryo cells before they are placed, or implanted, inside a mother's body. It is also named...

and 4 cell frog embryos and killed half of the cells of each embryo with a hot needle. He reported that they grew into half-embryos and surmised that...

word literally means "small egg." The megagametophyte (also called the embryo sac in flowering plants) is inside the ovule. The megagametophyte produces...

results is called the zygote. The zygote then multiplies, and grows into an embryo. So, a zygote is formed from the union of two gametes, and is the first...

Metchnikoff, www.encyclopedia.com Ovchinnikov, Dmitry A. 2008. Macrophages in the embryo and beyond: much more than just giant phagocytes. Genesis 46 (9): 447–62...

are now complete and articulated specimens, including feathers, eggs and embryos, and complete juveniles. In 1994 a fossil of an adult Troodon was found...

ability to clone humans. He claims to have cloned and implanted human embryos. His allegations, have been strongly rejected by doctors, lawmakers, religious...

process of cellular differentiation. Embryos start with their cells totipotent: they could become any tissue. . As embryos develop, their cells become specialised...

birth cord or funiculus umbilicalis) is a conduit between the developing embryo or fetus and the placenta. During prenatal development, the umbilical cord...

transfer nutrients over larger distances spinal cord Umbilical cord, a tube that connects a developing embryo or fetus to its placenta Vibrating string Chord...

Olivooides is an oogenus/genus of Cambrian-aged embryo fossil found in China. It was related to the Siberian Markuelia. Most Olivooides fossils are in...

carrying an unborn foetus. Before 9 weeks, the foetus is developing as an embryo. A human pregnancy is about 38 weeks long, from conception to childbirth...

little amniotic fluid and testing it. Fluid which contains tissue of the embryo or fetus allows the specialist doctor (such as radiologist or obstetrician)...

invasion to the body and should be a choice. They believe that an unborn embryo should not be valued over the pregnant woman. Pro-choice believes in a woman's...

A miscarriage is the natural death of an embryo or fetus in the womb, before it is old enough to live outside the mother. The medical words for a miscarriage...

errors) taking place in the DNA of each twin after the splitting of the embryo. It is estimated that, on average, a set of monozygotic twins will have...

Encyclopedia (2009); retrieved 2011-11-02. "Pope Pius XII"[permanent dead link], Embryo Project Archived 2011-10-05 at the Wayback Machine (2010); retrieved 2011-11-02...