Placenta

The placenta is a temporary embryonic and later fetal organ that begins developing from the blastocyst shortly after implantation. It plays critical roles in facilitating nutrient, gas and waste exchange between the physically separate maternal and fetal circulations, and is an important endocrine organ producing hormones that regulate both maternal and fetal physiology during pregnancy. The placenta connects to the fetus via the umbilical cord, and on the opposite aspect to the maternal uterus in a species-dependent manner. In humans, a thin layer of maternal decidual tissue comes away with the placenta when it is expelled from the uterus following birth. Placentas are a defining characteristic of placental mammals, but are also found in marsupials and some non-mammals with varying levels of development. Mammalian placentas probably first evolved about 150 million to 200 million years ago.

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COVID-19 zaps placenta's immune response, study finds

New Research Helps Us Understand Miscarriage and Placenta Development

Nanoparticles can cross the placenta during pregnancy, potentially exposing fetus

Placenta plays active part in transferring vitamin D to fetus during pregnancy

Plotting the placental protein NRK: Understanding the molecular evolution processes underlying placenta acquisition in eutherian ancestors

Placenta may hold clues for early autism diagnosis and intervention

Researchers discover how the placenta may be blocking SARS-CoV-2 transmission to babies during pregnancy

First study to detect Delta variant of SARS-CoV-2 in maternal bloodstream and placenta in cases of stillbirth and pregnancy complications

BPA exposure of the placenta could affect fetal brain development

Toxicity testing on the placenta and embryo

Toxicity testing on the placenta and embryo

AJR: Ultrasound, MRI aid placenta accreta diagnosis

No Evidence That Covid-19 Coronavirus Vaccines Damage Placenta Or Cause Infertility, Says Study

COVID-19 vaccine does not damage the placenta in pregnancy

COVID-19 vaccine does not damage the placenta in pregnancy

New ultrasound technique detects fetal circulation problems in placenta

Circadian clock in the mouse placenta

Placenta is a dumping ground for genetic defects

Placenta is a dumping ground for genetic defects