In the human placenta, there are placental villi, and the surface of the villi consists of syncytiotrophoblast, also called barrier cells, that serve as the main barrier against foreign substances.

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Caption Vitamin D must be transferred from the maternal blood across the layers of the human placental barrier to the foetus, as shown in this electron microscopy image. The maternal blood fills ...

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which can lead to interruptions in gas exchange across the placental barrier. Occlusion of one or more of the vessels in the umbilical cord can impede circulation to and from the fetus.

Infection with Zika virus in pregnancy can lead to neurological disorders, fetal abnormalities and fetal death. Until now, how the virus manages to ...

Infection with Zika virus in pregnancy can lead to neurological disorders, fetal abnormalities and fetal death. Until now, how the virus manages to cross the placenta, which nurtures the developing ...

Researchers say understanding how Zika virus spreads through the human placenta and reaches the fetus is critical to prevent or control the infection.

Infection with Zika virus in pregnancy can lead to neurological disorders, fetal abnormalities and fetal death. Until now, ...