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Placenta

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Symptoms of Placenta Previa

1:37

How to perform Manual Removal of the Placenta

3:57

The Viral Origins of the Placenta

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The Placenta: Its Development and Function

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Pregnancy: Types of Placenta

The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother's blood supply; to fight against internal infection; and to produce hormones which support pregnancy. The placenta provides oxygen and nutrients to growing fetuses and removes waste products from the fetus's blood. The placenta attaches to the wall of the uterus, and the fetus's umbilical cord develops from the placenta. These organs connect the mother and the fetus. Placentas are a defining characteristic of placental mammals, but are also found in marsupials and some non-mammals with varying levels of development. The homology of such structures in various viviparous organisms is debatable, and in invertebrates such as Arthropoda, is analogous at best.
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  • Structure 

  • Physiology 

  • Functions 

  • Clinical significance 

  • Society and culture