Inaccurate dating of the pregnancy dating sites in thaiand

Inaccurate dating of the pregnancy

It is very important to remember what a screening test is before getting one performed.Blood is drawn from veins in the mother’s arm and sent off to a laboratory for analysis.In order to use Medscape, your browser must be set to accept cookies delivered by the Medscape site.Medscape uses cookies to customize the site based on the information we collect at registration.The first trimester is from week one through 12 and includes conception. The fertilized egg then travels down the fallopian tube and attaches to the inside of the uterus, where it begins to form the embryo and placenta. Around the middle of the second trimester, movement of the fetus may be felt.At 28 weeks, more than 90% of babies can survive outside of the uterus if provided with high-quality medical care.The third trimester is from 29 weeks through 40 weeks.Term pregnancy is 37 to 41 weeks, with early term being 37 and 38 weeks, full term 39 and 40 weeks, and late term 41 weeks. Babies born before 37 weeks are preterm and are at higher risk of health problems such as cerebral palsy.

These tests DO NOT diagnose a problem; they only signal that further testing should be done.

Results are usually returned between one and two weeks.

MSAFP may be performed between the 14th and 22nd weeks of pregnancy, however it seems to be most accurate during the 16th to 18th week.

However, the quad screen looks for not only the three specific substances evaluated in those tests (AFP, h CG, and Estriol) but also a fourth substance known as Inhibin-A.

The screen is essentially the same as the screening tests that look for only three substances, except the likelihood of identifying pregnancies at risk for Down Syndrome is higher through the evaluation of Inhibin-A levels. It is very important to remember what a screening test is before getting one performed.

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