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Details for anatomical structure: chorion

EndoNet ID: ENC00584

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chorion, , Chorion

General information

The highly vascular outer embryonic membrane that is assicoated with the allantois in the formation of the placenta.

Links to other resources

Cytomer cy0028199

Larger structures


    • cell_of_syncytiotrophoblast
    • mesodermal_cell
    • mesenchyme_cell
    • cytotrophoblast
    • fibroblast

    Secreted hormones


      • Receptor: PRLR

        Induced phenotype:

        • polyhydramnios
          • An excessive volume of amniotic fluid, known as polyhydramnios, is associated with decreased levels of amniotic fluid PRL or PRLR levels in the chorion laeve. [1]
          • This effect may be related to the osmoregulatory role of PRL during fetal life and to the inhibitory effect on amniotic fluid volume observed in monkeys. [2]