https://wikimd.org/index.php?action=history&feed=atom&title=PlacentationPlacentation - Revision history2026-04-26T12:18:24ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.org/index.php?title=Placentation&diff=6323304&oldid=prevPrab: CSV import2025-02-18T11:31:20Z<p>CSV import</p>
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</table>Prabhttps://wikimd.org/index.php?title=Placentation&diff=5291141&oldid=prevPrab: CSV import2024-02-25T15:10:06Z<p>CSV import</p>
<p><b>New page</b></p><div>'''Placentation''' refers to the development and formation of the [[placenta]] in the uterus during pregnancy. It is a crucial process in the reproductive cycle of mammals, including humans, as it facilitates the exchange of nutrients, gases, and wastes between the mother and the fetus. <br />
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==Types of Placentation==<br />
There are several types of placentation, each characterized by the arrangement of ovules within the ovary. These include:<br />
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* '''Axile Placentation''': In this type, the placenta is formed along the central axis of the ovary, with the ovules attached to it. This is common in plants with a superior ovary, such as [[Primulaceae]] and [[Ranunculaceae]].<br />
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* '''Parietal Placentation''': Here, the ovules are attached to the outer wall of the ovary. This is common in plants with an inferior ovary, such as [[Brassicaceae]].<br />
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* '''Free Central Placentation''': In this type, the ovules are attached to a free-standing column in the center of the ovary. This is seen in plants like [[Primrose]].<br />
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* '''Basal Placentation''': Here, a single ovule is attached to the base of the ovary. This is seen in plants like [[Sunflower]].<br />
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==Placentation in Mammals==<br />
In mammals, placentation refers to the formation of the placenta, a vital organ that facilitates the exchange of nutrients, gases, and wastes between the mother and the fetus. The type of placentation varies among different species. In humans, it is classified as '''deciduous''' and '''hemochorial''' where the entire maternal endometrium is involved and the placental cells directly contact the mother's blood.<br />
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==See Also==<br />
* [[Placenta]]<br />
* [[Ovary]]<br />
* [[Pregnancy]]<br />
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[[Category:Reproductive biology]]<br />
[[Category:Plant anatomy]]<br />
[[Category:Mammalian pregnancy]]<br />
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