Implantation

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implantation

[‚im‚plan′tā·shən]
(medicine)
Placement of a tissue transplant in depth in the body.
Placement in the body of a device for mechanical repair, such as for a ventral hernia or a fracture.
Embedding of an embryo into the endometrium.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Implantation

 

the attachment of the embryo to the wall of the uterus in man and in all mammals with intrauterine development.

Three types of implantation are distinguished: superficial implantation, in which the embryo remains in the uterine cavity and attaches itself to the wall either by the entire surface of the trophoblast or by part of it (in Chiroptera and ruminants); eccentric implantation, in which the embryo deeply penetrates a fold of the uterine mucosa (a uterine crypt), the wall of which then grows together over the embryo and forms an implantation chamber that is isolated from the uterine cavity (in rodents); and interstitial implantation, characteristic of higher mammals (primates and man), in which the embryo destroys cells of the uterine mucosa and implants itself within the cavity formed, the uterine defect then healing and the embryo embedding itself totally within the uterine wall, where its subsequent development occurs.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Embryo implantation rate (%)###33.82% (70/207)###25.37% (34/134)###28.87% (136/471)###30.00% (36/120)###0.352
The uterine immune profile may help women with repeated unexplained embryo implantation failure after in vitro fertilization.
The surfaces of pinopodes may have some receptors for adhesion molecules, which are essential for embryo implantation [42].
As angiogenesis is important for embryo implantation and nutrition, a regular Sdc-1 expression might therefore ensure this capacity.
In Medline, we used the mesh term of "medicine, east Asian traditional", "medicine, Chinese traditional", "medicine, Korean traditional", "medicine, Kampo", "plant extracts", "herbal medicine", "uterine receptivity", "uterine endometrium", "endometrial receptivity", and "embryo implantation".
"In this case, it may be that early exposure to air pollution set off inflammation or other internal stresses that interfere with embryo implantation or placental development.
Moreover, our observations are the first demonstration of higher rate of steroidogenesis in young animals, than in adult females during early stages of gravidity and before embryo implantation. It is not to be excluded, that age-dependent reduction in ovarian steroid hormones level could be a cause of future infertility in old animals.
Jamie said: "I was only the second farmer in the UK to keep Valais Blacknose sheep, and the first to breed successfully using embryo implantation.
We are looking for an increase in so-called natural killer cells which can be implicated in failure of embryo implantation and miscarriage.
Currently, three spliced variants of LIF have been identified which include membrane-associated, diffusible, and truncated forms acting as paracrine factors in embryo implantation [2].