Problems During Prenatal Development & Prenatal Testing.
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Transcript of Problems During Prenatal Development & Prenatal Testing.
Problems During Prenatal Development
& Prenatal Testing
Ultrasound
• Sound waves make a video image
• Structural problems and multiple births can be detected; Least risk involved
3D/4D Ultrasound Pictures
Ultrasound Video
http://www.layyous.com/ultasound/ultrasound_video.htm
http://www.mayoclinic.com/health/ultrasound/MM00084
American Pregnancy Association
• Weekly Updates• http://americanpregnancy.org/tag/first-trimester
• Prenatal Tests • http://americanpregnancy.org/category/prenataltesting
Amniocentesis
• Amniotic fluid is withdrawn for testing
• Occurs: Weeks 14-20
• Reason: – Health care provider recommended following an abnormal triple test
result– Identifying chromosome abnormalities, neural tube defects, and other
inherited disorders• Down syndrome / Trisomy 21
• Accuracy: 98-99%
• Risk: – 1/200 women who have this procedure miscarry
• Due to infection of the uterus, preterm labor
Amniocentesis
Chorionic Villi Sampling (CVS)
• Tissue around the fetus is taken for testing• Trans cervical Or Trans abdominal
• Occurs: During weeks 10-13
• Reason: – Identifying chromosome abnormalities and other inherited disorders
• Does not allow for testing for neural tube defects– Collects larger samples and provides faster results than amniocentesis– Provides access to DNA for paternity testing prior to delivery
• Accuracy: 98-99%
• Risk: • 1/100 women who have this procedure miscarry • Higher risk than an amniocentesis
Chorionic Villi Sampling