placentation การใช้

• In humans, placentation takes place 7 8 days after fertilization.
• Hubrecht磗 most important work was in embryology and placentation of the mammals.
• The ovary is inferior and has only one ovule, with basal placentation.
• Decidualization plays an important role in promoting hemochorial placentation.
• The flowers are perfect, ovary is superior and bicarpellated, with axile placentation.
• Marginal placentation, each pistil bearing one locule, with one to many ovules.
• Each carpel will usually have a distinct line of placentation where the ovules are attached.
• During pregnancy, placentation is the formation and growth of the placenta inside the uterus.
• After implantation of the embryo, the decidua further develops to mediate the process of placentation.
• Each locule of the superior ovary has 2 ovules with axile placentation that are anatropous to campylotropous.
• Abnormal placentation can lead to an early termination of pregnancy, for example in pre-eclampsia.
• The gynoecium is bicarpelar ( rarely three-or five-locular ) with a axial placentation.
• The flower has a syncarpous gynoecium ( fused-carpellate ovary ) with 5 carpels and has parietal placentation.
• However, decidualization-like reactions have also been observed in some species that don't display hemochorial placentation.
• Unlike other members of the Melianthaceae, " Greyia " has simple ( undivided ) ovaries with parietal placentation.
• Gesneriaceae have traditionally been separated from Scrophulariaceae by having a unilocular rather than bilocular ovary, with parietal rather than axile placentation.
• There is a one locular ovary with a basal placentation; one ovule; a subsessile stigma, which is discoid or capitate.
• Because of its placentation, the specimen was determined to be a member of the Scrophulariaceae ( later Plantaginaceae " sensu"
• It is three-carpelate and one or, more rarely, three-partitioned, with parietal placentation ( axile in the Apostasioideae ).
• However, unlike eutherian mammals, epitheliochorial placentation is not maintained by maternal tissue as embryos do not readily invade maternal tissue outside of the uterus.