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How Often Is The Testing For Down Syndrome During Pregnancy Wrong
Chromosome analysis : obtained by amniocentesis or Chorionic Villous Sampling is diagnostic for Trisomy 21, other trisomies & monosomies. It is offered if the calculated statistical risk of DS from screening by blood tests & fetal ultrasounds + maternal age at EDD & family history reaches a cut-off point, often 1:270. This calculated risk method has an 80% detection rate & a 5% false-positive rate. ...Read moreSee 2 more doctor answers
When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more
Depends: There are both screening tests and confirmatory tests. Screening tests ale less invasive but less specific.They are designed to take a thousand pregnant women and narrow down that number to 100 that need the more specific/invasive/costly test. Depending on which test you had, the results could mean several things. Call your doc. ...Read more
Screening for Down : Syndrome is offered to all pregnant women in the US, regardless of age. If screening test results + maternal age reveal a high risk for DS, diagnostic tests are offered. Risk for DS becomes significantly higher & increases yearly in women wil be 35 or older at the time of full-term delivery. Though screening for DS is highly recommended, pregnant women can choose not to have it done. ...Read moreSee 1 more doctor answer
Screening for DS, : offered to all pregnant women, is done after 10 weeks' gestational age, usually at 11-13 weeks. Both the 1st trimester comprehensive screen & the 1st & 2nd trimester integrated screen use fetal ultrasounds, blood tests for specific proteins & hormones & maternal age at delivery to calculate risk of DS. (If 36, risk us 1:294; if 37, 1:227). Diagnostic tests are offered if calculated risk is high. ...Read more
Chromosome defect: Ds is one of the more common chromosome(c) defects that can survive pregnancy (many others miscarry). It usually happens when an egg with an extra 21c combines with a normal sperm ; creates a baby with the extra 21c in all tissues.Risks vary with age and are lowest in the early 20's(1/2000), rising to 1/100 at about 40 ; 1/12 at 49.Various prenatal tests can pick up signs early on. ...Read more
Separate study: If you are having the one study done it is simple enough to arrange for the other study at the same time. They are separate tests and often done at a separate lab. ...Read more
Hi doctor , in ultra suond.U/s congenital anomaly detect or down syndrome detect during pregnancy ?
My first baby is down syndrome, what is the test must my wife doing during the first trimester of second pregnancy?
Depends: Your risk of a second ds birth is about 1% plus any age factor risk if the first baby was a 21 trisomy.The most specific tests would be chorionic villus sampling or amniocentesis for chromosomal analysis. Cvs can be done in early pregnancy and amniocentesis around 16 wks.Both procedures have some risk to mom and the baby.There are some less invasive but less definitive tests.Ask ur doc. ...Read more
Down syndrome is the classic presentation clinically of the congenital malformation syndrome also known as Trisomy 21. Classic features may include simian creases, epicanthal folds, upslanting palpebral fissures, flat nasal bridge, hypertelorism, low set ears, endocardial cushion defects of the heart, atlanto-axial joint instability, blood ...Read more
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