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.

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.

References in periodicals archive ?
0% of the 1159 patients originally enrolled in the registry and underwent stent implantation for the treatment of ULMCA disease in the absence of cardiogenic shock during the study period.
Follow-up contrast-enhanced CT of the abdomen was performed 1-week after the fiducial marker implantation to evaluate the fiducial marker migration and delayed complication.
After a repeat implantation procedure, 36% of the women developed one adverse event, 19% developed two, and 8% developed three or more adverse events.
3) Integrins: These are a group of 'cell-adhesion' peptide molecules which are accepted as the markers of the receptivity of the endometrium for implantation and normal fertility.
Nitrogen ion implantation results in an extraordinary increase in surface hardness, to the equivalent of as much as 80 to 90 HRC.
Ion implantation involves the bombardment of materials with ions of a given atomic element traveling at very high speed.
From this review, it is clear that although complications associated with cochlear implantation have been catalogued numerically, there is a paucity of detailed reports describing them clinically.
Federal Food and Drug Administration has recommended taking high-dosage pills as a "morning-after pill" since they can prevent implantation.
In normal, healthy women, Lessey says, beta-3 appears on the endometrial epithelium "like clockwork" on the 19th to the 20th day of the menstrual cycle, corresponding to the body's preparation for implantation and pregnancy.
Bacteria are introduced primarily at the time of device implantation or in the immediate post-operative period.
Using a technique called ion implantation to embed metal ions in glassy and crystalline substrates, a group of scientists led by Richard E Haglund Jr.

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