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First Trimester Serum Screening
Ob terms: 1st trimester screening are any tests done during a pregnancy during the first 12-14 weeks of pregnancy. This can include ultrasounds. blood tests and others. Maternal fetal medicine is a subspecialty of obstetrics. It's also often called "perinatology". These are obstetricians who go on to do additional training in the management of high risk pregnancies. ...Read more
Examples are: colonoscopy for colon polyp or cancer; mammograms for breast lesions or cancer; psa a blood test that could indicate enlargement of cancerous prostate tissue; blood sugar or hemoglobin a!c for diabetes. Many think that scanning the whole body will pick up a cancer--in all likelihood, it will not. There also is no good blood test, yet, ...Read more
Within 3 days usu.: 6 days maximumGet a more detailed answer ›
May...: In some places it is a routine to test for the basic STD's again in the third trimester but in general the CDC recommends to repeat testing at that time if there are risk factors that can point to possible active infection.Usually if the pt is younger than 25 y/o,has been recently exposed to STD's,was treated for an STD, or is a high risk for exposure( ex. multiple partners, infected partner, etc) ...Read more
Varies: Hcg levels vary by week and even by day. See this site for more info. http://www.americanpregnancy.org/duringpregnancy/hcglevels.html. ...Read more
Very accurate: Ultrasounds tend to get more inaccurate as your pregnancy progresses. First trimester ultrasounds are more accurate than second trimester ultrasounds, which are in turn more accurate than third trimester ultrasounds. First trimester ultrasounds can reliably predict gestational age within 5-7 days. ...Read moreSee 1 more doctor answer
Yes: It is standard practice to test both rubella and HIV antibodies early in pregnancy. Typically one also gets an antigen test for hepatitis b, and a test for syphilis (sometimes an antibody test, and other times a different test is used). Additional tests such as a complete blood count, blood type, rh typing, urine analysis are standard as well. See your ob; they'll do the right tests. ...Read more
Diagnostics: This question is hard to answer because it depends upon what you're looking for with your first trimester ultrasound. If you're trying to figure out how far along you are in the pregnancy that is excellent, if you're trying to figure out if your baby has down syndrome it's not perfect and will require further work up with other blood tests and ultrasounds. ...Read more
I had a normal first trimester screening and harmony prenatal test. Is an AFP blood test necessary? Can it come back high risk?
The msAFP is: To assess the risk of open neural tube defects i.e. Spina bifida, which is not tested by harmony or the first trimester screen. It is up to you if you would like to be screened for ntds. Keep in mind that, if detected, these defects can be repaired by a skilled pediatric neurosurgeon while the baby is still inside you. Speak to your obgyn and make an informed decision. Hope this helps. ...Read moreSee 1 more doctor answer
How accurate are 1st trimester ultrasounds in estimating gestational age? What about 2nd trimester ultrasounds?
Accurate!: 1st trimester ultrasounds are very accurate - have correlated with timed ivf pregnancies. We usually consider 1st trimester scans accurate within 5-7days' 2nd trimester scans within 10-14days. ...Read more
Depends on the type: Of test. Blood tests measure actual levels of HCG and can detect 10 u. Urine tests are generally designed to read positive at a level of 25 u. If by 3 weeks you mean three weeks from the last menstrual period, it is likely too early to test. You should wait after a missed period to test for pregnancy. ...Read more
Will a vanishing twin (lost at 7 weeks) affect first trimester downs syndrome testing with blood test and ultrasound?
Vanishing twin: No, it would not affect your test result. Ultrasound would show it for a while, but the developing twin will eventually grow big enough to hide it from view. ...Read more
Early Ultrasounds: Actually they are thought to be the most accurate. ...Read more
Blood and U/S tests.: First trimester screen for any pregnancy includes a sonographic examination to determine plurality, basic fetal anatomy, gestational sac location, fetal viability and gestational dates - as well as blood tests (hcg, papp-a, maternit21/harmony tests) to determine the risk for down syndrome, fetal growth restriction, preeclampsia (uterine artery dopplers), preterm birth (cervical length). Nicolaides. ...Read more
How accurate are second and third trimester sonogram measurements in figuring date of conception?
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- First screening
- Maternal serum screening
- Second trimester screening test
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- Vomiting during first trimester
- Caffeine first trimester
- Symptoms of first trimester
- Avoiding miscarriage in first trimester
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