I believe it means that they have only seen one sac--as in one embryo...not twins.
If you blood work is positive , give it a couple more weeks .
It was difficult to see the line that represents the very beginning of the embryo. Most likely, the gestational sac was seen on the ultrasound.
The protective sac around the embryo or fetus is the amniotic sac.
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The number of cells within an embryo sac is typically equal to the number of nuclei within the embryo sac. This is because each cell of the embryo sac contains one nucleus, and during the process of embryo sac development, the number of cells and nuclei increase concurrently.
The likelihood of a viable pregnancy is uncertain in this situation as the fetal pole should normally be visualized at this stage. Further monitoring with repeat ultrasounds and testing of hCG levels may be needed to assess the progression of the pregnancy. It is important to follow up with your healthcare provider for a more comprehensive evaluation.
A fluid-filled sac that surrounds an embryo is called an amniotic sac. This sac contains amniotic fluid, which provides protection and cushioning for the developing embryo.
The protective sac surrounding the embryo is formed by the amniotic membrane and the amniotic fluid which together create the amniotic sac. This sac serves to cushion and protect the developing embryo during pregnancy.
You will likely see the gestational sac and maybe the yolk sac.
The Amniotic Sac
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