Pregnant women undergo screening tests during the first and the second trimester to detect any birth defects or genetic disorders in the foetus. To detect birth defects during pregnancy, screening tests are performed based on the stages of pregnancy. Pre natal tests rarely miss any birth defect making it a reliable diagnostic tool for doctors to rely upon.
First Trimester Screening
The screening during the early stages of the pregnancy is a combination of diagnostic tests between the 11th and the 13th week of the pregnancy. It checks for birth defects related to the heart or chromosomal disorders such as Down syndrome. It includes a blood tests and an ultrasound.
Second Trimester Screening
The second trimester screening is completed between 15 to 18 weeks of pregnancy. The diagnostics tests for birth defects during pregnancy include maternal serum screening, anomaly ultrasound and amniocentesis.
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