villus

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villus

1. Zoology anatomy any of the numerous finger-like projections of the mucous membrane lining the small intestine of many vertebrates
2. any similar membranous process, such as any of those in the mammalian placenta
3. Botany any of various hairlike outgrowths, as from the stem of a moss

villus

[′vil·əs]
(anatomy)
A fingerlike projection from the surface of a membrane.
References in periodicals archive ?
Obstetricians use various methods to attain fetal cells for diagnosis, including chorionic villus sampling (CVS), amniocentesis (AC), and cordocentesis (CC).
Beta-thalassemia-institution based analysis of ethnic and geographic distribution, effect of consanguinity and safety of chorionic villus sampling as a diagnostic, tool for pre-natal diagnosis in selected patients.
It then covers complications such as recurrent spontaneous abortion, preeclampsia and eclampsia, postpartum hemorrhage, emergency care, blood group alloimmunizations, multiple gestations, prevention and management of preterm birth, placental disorders, prolonged pregnancy, cesarean and breech delivery, analgesia and anesthesia, and neonatal encephalopathy and cerebral palsy, ending with amniocentesis and chorionic villus sampling procedures and fetal surgery.
It is often stated that more fetuses are lost due to such invasive procedures (amniocentesis and chorionic villus sampling) than are identified as carrying a chromosomal abnormality.
Despite the decrease in HIV transmission with antiretroviral cover, procedures such as chorionic villus sampling and cordocentesis should still be avoided in the HIV-infected woman as the risk of transmission to the fetus may be considerably higher.
4) The Royal College of Obstetricians and Gynaecologists guideline on amniocentesis and chorionic villus sampling advises that patients should be informed of an additional 1% risk of fetal loss following an amniocentesis, and a slightly higher risk following chorionic villus sampling.
All of these pregnant women are then offered the option of further, invasive tests including amniocentesis or chorionic villus sampling, which have about a 1% risk of miscarriage.
The risk of miscarriage following genetic Amniocentesis and Chorionic Villus Sampling was investigated in randomized clinical trials in the 1980's and early 1990's13,14.
Accuracy of cytogenetic findings on chorionic villus sampling (CVS) -- diagnostic consequences of CVS mosaicism and non-mosaic discrepancy in centres contributing to EUCROMIC 1986-1992.
Amniocentesis is associated with a one-in-two hundred incidence, and chorionic villus sampling with a one-in-one hundred incidence of abortion of the unborn child.