| Prenatal tests called amniocentesis and chorionic villus sampling can diagnose Tay-Sachs before birth. |
|
| Another prenatal test, called chorionic villus sampling, can diagnose most, but not all, of the same birth defects as amniocentesis. |
|
| Women at higher risk of carrying a baby with such conditions may opt for testing procedures like amniocentesis or chorionic villus sampling. |
|
| These options include amniocentesis, early amniocentesis, chorionic villus sampling, and ultrasound examination. |
|
| Early amniocentesis offers a similar advantage, but the fetal loss rate associated with this technique is higher than that of chorionic villus sampling. |
|
| Prenatal diagnosis would consist of DNA analysis done on cells obtained by chorionic villus sampling or amniocentesis. |
|
| Some birth defects can be diagnosed before birth, using one or more prenatal tests including ultrasound, amniocentesis and chorionic villus sampling. |
|
| In cases where Down syndrome is suspected, the disorder can be confirmed using amniocentesis or chorionic villus sampling. |
|
| Current diagnosis of fetal aneuploidy is based on karyotyping fetal cells obtained from amniocentesis or chorionic villus sampling. |
|
| First trimester villi samples were collected from leftover material obtained via chorionic villus sampling. |
|
| Using chorionic villus sampling techniques, examination will in many cases be possible as early as the 10th week in the near future. |
|
| The only definitive test involves chorionic villus sampling and amniocentesis but that carries a risk of miscarriage. |
|
| Since the methylation status of the FMR-1 gene is often not yet established in chorionic villi at the time of sampling, the chorionic villus sampling results must be interpreted with caution. |
|
| Besides allowing an earlier prenatal diagnosis, the use of noninvasive techniques eliminates the risk of fetal miscarriage associated to amniocentesis or chorionic villus sampling. |
|
| They are also separate from the questions that were raised by the development of new techniques for prenatal diagnosis such as fetoscopy and chorionic villus sampling. |
|
| It may be detected prior to birth through prenatal genetic testing on samples of placental or fetal tissue collected by chorionic villus sampling or amniocentesis, respectively. |
|
| In prenatal diagnosis, samples of amniotic fluid removed in amniocentesis or placental tissue removed in chorionic villus sampling contain cells from the baby, which can be karyotyped to look for chromosomal abnormalities. |
|
| People who do not want the expense and trouble of preimplantation diagnosis can become pregnant naturally and then have the fetus tested via amniocentesis or another procedure, chorionic villus sampling. |
|
| It is also possible to obtain a prenatal diagnosis for an embryo or fetus in the womb, using fetal genetic material acquired through chorionic villus sampling. |
|
| The test is not diagnostic and a positive result is usually followed up with a diagnostic amniocentesis or chorionic villus sampling test. |
|
|
|
| One caveat with first-trimester screening is the need to train a sufficient number of physicians in chorionic villus sampling. |
|
| For invasive testing, one chorionic villus sampling covers both monochorionic twins, but amniocentesis typically is performed on each amniotic sac. |
|
| At present the only other way to diagnose these diseases is to do amniocentesis or chorionic villus sampling, both of which carry a small risk of miscarriage. |
|
| 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. |
|
