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  2. Chorionic villi - Wikipedia

    en.wikipedia.org/wiki/Chorionic_villi

    The chorionic villi are at first small and non-vascular. 13–15 days: trophoblast only [1] Secondary: The villi increase in size and ramify, while the mesoderm grows into them. 16–21 days: trophoblast and mesoderm [1] Tertiary: Branches of the umbilical artery and umbilical vein grow into the mesoderm, and in this way the chorionic villi are ...

  3. Chorionic villus sampling - Wikipedia

    en.wikipedia.org/wiki/Chorionic_villus_sampling

    Chorionic villus sampling (CVS), sometimes called "chorionic villous sampling" (as "villous" is the adjectival form of the word "villus"), [1] is a form of prenatal diagnosis done to determine chromosomal or genetic disorders in the fetus.

  4. Chorion - Wikipedia

    en.wikipedia.org/wiki/Chorion

    The chorionic villi are at first small and non-vascular, and consist of the trophoblast only, but they increase in size and ramify, whereas the mesoderm, carrying branches of the umbilical vessels, grows into them, and they are vascularized.

  5. Prenatal testing - Wikipedia

    en.wikipedia.org/wiki/Prenatal_testing

    Chorionic villus sampling: Involves getting a sample of the chorionic villus and testing it. This can be done earlier than amniocentesis, but may have a higher risk of miscarriage, estimated at 1%. After 10 weeks More invasive Amniocentesis: This can be done once enough amniotic fluid has developed to sample. Cells from the fetus will be ...

  6. Confined placental mosaicism - Wikipedia

    en.wikipedia.org/wiki/Confined_placental_mosaicism

    This trisomy is confined to the chorionic villus stroma. This type of mosaicism is described in normal pregnancies and is sometimes associated with delayed growth of the fetus. Type 3 CPM– Trisomic cells are seen in trophoblast cells and the villus stroma, but are absent in the embryo. This type of mosaicism is more commonly associated with ...

  7. Placentitis - Wikipedia

    en.wikipedia.org/wiki/Placentitis

    Histopathology of acute subchorionic intervillositis, with neutrophils in Langhan’s layer of fibrinoid (by the fetal surface, at the base of a chorionic villus, seen at top right). Placentitis is an inflammation of the placenta. The main forms of placentitis are: Villitis, inflammation of chorionic villi.

  8. Syncytiotrophoblast - Wikipedia

    en.wikipedia.org/wiki/Syncytiotrophoblast

    Image showing trophoblast differentiated into the two layers of cytotrophoblast and syncytiotrophoblast during implantation. It is the outer layer of the trophoblasts and actively invades the uterine wall, during implantation, rupturing maternal capillaries and thus establishing an interface between maternal blood and embryonic extracellular fluid, facilitating passive exchange of material ...

  9. Products of conception - Wikipedia

    en.wikipedia.org/wiki/Products_of_conception

    Chorionic villi (right of image) and cartilage, i.e. fetal parts (left of image). H&E stain. Products of conception, abbreviated POC, is a medical term used for the tissue derived from the union of an egg and a sperm. It encompasses anembryonic gestation (blighted ovum) which does not have a viable embryo.