| 11. | Each villus has a network of capillaries and fine lymphatic vessels called lacteals close to its surface.
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| 12. | Villus capillaries collect amino acids and simple sugars taken up by the villi into the blood stream.
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| 13. | Older women often have amniocentesis or chorionic villus sampling _ invasive tests that give much more definitive answers.
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| 14. | Chorionic villus DNA analysis or analysis of fetal red cells can be used to detect TPI in antenatal diagnosis.
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| 15. | Once pregnant, testing can be done on fetal cells obtained via chorionic villus sampling ( CVS ) or amniocentesis.
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| 16. | The test is chorionic villus sampling, or CVS, which is done at 10 weeks of pregnancy or later.
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| 17. | Couples who become pregnant are advised to have amniocentesis or chorionic villus sampling, the current prenatal tests, as backup.
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| 18. | These tests can also be performed prenatally to detect aneuploidy in a pregnancy, through either amniocentesis or chorionic villus sampling.
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| 19. | The test is for diagnosis, and does not have nearly the same predictive power of amniocentesis or chorionic villus sampling.
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| 20. | Microvilli are present on the epithelium of a villus and further increase the surface area over which absorption can take place.
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