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The yolk sac functions as a means for nourishment of the embryo before the circulatory system and the placenta develop.For many women, especially after 8 weeks gestation, sufficient information about the baby may be obtained with transabdominal ultrasound only.Large pregnant women face even more confusion, since prenatal testing can be slightly harder in this population, and the results can be more confusing.However, since they may be at a somewhat increased risk for problems like neural tube defects, they also face greater pressure than others to have these prenatal tests, even though the tests are often difficult to interpret.

Task, so get ready to put it 4 ultrasound into his own life.

Big moms should read THIS FAQ first before reading the other FAQ so that they can understand the full implications of ultrasounds in general, before reading how they impact big moms in particular.

"The technology of prenatal diagnosis is usually presented to us as a solution, but it brings with it problems of its own..technology of prenatal diagnosis has changed and continues to change women's experience of pregnancy." All pregnant women in our technology-happy modern society face confusing choices about prenatal testing, its advantages and disadvantages, and its appropriateness for them.

However, in the early pregnancy, the developing embryo is very small (at 6 weeks gestation, the baby is only 5-9mm long) and a transvaginal ultrasound may be required to get a better image of the baby.

Transvaginal ultrasound is safe and commonly performed during all stages of pregnancy, including the first trimester. The authors and editors of Medscape Reference gratefully acknowledge the contributions of previous authors Paul T Wilkes, MD and Henry Galan, MD to the development and writing of this article.