BGDA Practical Placenta - Diagnostic Techniques

Fetus in Utero Between fifth and sixth months

Chorionic Villus Sampling

Chorionic Villus Sampling test is done in the 10th to 12th week after the first day of the mother's last menstrual period. The test is done by looking at cells taken from the chorionic membrane or placenta. No anaesthetic is required, and a test result is usually available in two to three weeks. When the test is carried out by an obstetrician experienced in the technique, the risk of miscarriage related to the test is about 2%. Potential disadvantages include maternal cell contamination, placental mosaicism and failure to obtain an adequate specimen. This may result in the need for a repeat procedure or amniocentesis. Links: Chorionic villus sampling

Amniocentesis

Amniocentesis is a prenatal diagnostic test carried out mainly between 14th to 18th week of pregnancy. Amniotic fluid is taken from the uterus, sent to a diagnostic laboratory and embryonic cells isolated from the amniotic fluid. No anaesthetic is required, and a result is usually obtained in about three to four weeks. When the test is carried out by an obstetrician experienced in the technique, the risk of a miscarriage related to the test is about 1 %. Links: Amniocentesis

| Placenta - Amnionic Sac

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Cite this page: Hill, M.A. (2024, May 13) Embryology BGDA Practical Placenta - Diagnostic Techniques. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/BGDA_Practical_Placenta_-_Diagnostic_Techniques

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G