placentation


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plac·en·ta·tion

 (plăs′ən-tā′shən)
n.
1.
a. Formation of a placenta in the uterus.
b. The type or structure of a placenta.
2. Botany Arrangement of placentas within the ovary.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

placentation

(ˌplæsɛnˈteɪʃən)
n
1. (Botany) botany the way in which ovules are attached in the ovary
2. (Zoology) zoology
a. the way in which the placenta is attached in the uterus
b. the process of formation of the placenta
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.placentation - the formation of the placenta in the uterus
bodily function, bodily process, body process, activity - an organic process that takes place in the body; "respiratory activity"
2.placentation - arrangement of the ovules in the placenta and of the placentas in the ovary
reproductive structure - the parts of a plant involved in its reproduction
apical placentation - where one or few ovules develop at the top of a simple or compound ovary
axile placentation - ovules are borne at or around the center of a compound ovary on an axis formed from joined septa
basal placentation - where one or few ovules develop at the base of a simple or compound ovary
free central placentation - where ovules develop on a central column in a compound ovary lacking septa or with septa at base only
lamellate placentation - with ovules on thin extensions of the placentae into a compound ovary
marginal placentation, ventral placentation - with ovules borne on the wall along the ventral suture of a simple ovary
parietal placentation - where ovules develop on the wall or slight outgrowths of the wall forming broken partitions within a compound ovary
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
In pathogenesis of OHSS, as well as in inflammatory cascade leading to a preterm birth, proinflammatory cytokines such as interleukins 2, 6 and 8 and VEGF could be of importance.4,17 A severe form of hyperstimulation followed by an increased permeability of blood vessels with consequent hemoconcentration and hemodynamic instability could have had an impact on the placentation process.
Conservative management of abnonormally invasive placentation. Obstet Gynecol Surv 2007; 62: 529-39.
Suction evacuation is the conventional and acceptable method but incomplete evacuation, cervical incompetence, uterine perforation and damage to endometrium or myometrium (resulting in abnormal placentation in next pregnancy) are known complications.
Patients with known placentation problems, significant maternal or known fetal anemia, maternal bleeding disorders, and preeclampsia were excluded.
Notably, the fetus tends to be breech or transverse presentations because of the abnormal horn cavity or the placentation. For women with a previous normal delivery, the identification of RHPs is more obscure and difficult.
Abnormal placentation (Accreta, Increta and Percreta) became the leading indication for peripartum hysterectomy.
This is occurring in a setting of disappearing experience and skills essential for these deliveries and simultaneous mounting international concern over increasing maternal morbidity and mortality (namely, maternal hemorrhage and abnormal adherent placentation) due to planned cesareans-irrespective of fetal presentation.
(4) In 2016, the European Working Group on Abnormally Invasive Placenta (EW-AIP) proposed a set of US markers that always should be reported when performing an US examination for suspected abnormal placentation (table).
The sequential biochemical profile of the amniotic fluid during placentation and fetal growth stages of pregnancy are not yet been fully reported despite the study of Ozegbe (2005) that has been carried out at full term.
Although the pathophysiology of PE is unclear, abnormal placentation appears to be a key factor accounting for the development of PE.
Sixteen patients had cesarean deliveries; the indications were previous cesarean section for ten, presentation abnormality for four, and placentation abnormality for two of the pregnant women.