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 ?
Low testosterone levels in women with diminished ovarian reserve impair embryo implantation rate: a retrospective case-control study.
The complications in roe deer reproduction could be due also to a short defined rutting season (from mid-July to mid-August), long latent period of embryogenesis (between mating in July-August and embryo implantation in November-December), relatively long post-implantation prenatal development (from November-December up to parturition in May-June), which represents potential risk for getting offspring in this species (Raesfield et al.
Embryo implantation is the outcome of successful intercellular interactions that form a link between encroaching embryo and receptive endometrium in a "window of implantation" at day 20-24 of a regular 28-day menstrual cycle.
The effect of uterine fibroids on 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.
However, this tolerogenic priming effect on a woman's immune system, allowing for improvement in embryo implantation rates, appears to be lost if she changes male partners.
KEY WORDS: bisphenol A, embryo implantation, fertility, human, reproduction, women.
Quebec's decision to publicly fund in vitro fertilization and to introduce regulations mandating single embryo implantation, promises to have beneficial health consequences for Quebeckers, as it will reduce multiple pregnancies and the health risks associated with twins, triplets or higher-order multiple gestations.
Following further tests and hormone treatments to help the womb lining thicken, Nia later returned to London for the embryo implantation process.
From an October 2010 conference in London, 18 articles consider such topics as stem cells in endometrium and their role in the pathogenesis of endometriosis, ovarian cryopreservation strategies and the find control of ovarian follicle development in vitro, strategies to improve embryo implantation to supraphysiological rates, intensive care treatment of ovarian hyperstimulation syndrome, and long-term progestin-only contraception in humans versus animal models.
The technique - if translated in future trials - could be used to select embryos more likely to result in a successful pregnancy, reducing the need for multiple embryo implantation during IVF treatment.