What Is the Gestational Sac?

The gestational sac (GS) is the earliest diagnosis of B-ultrasound. The presence of a gestational sac in the womb is the earliest phenomenon in ultrasound diagnosis. It can occur at 5 weeks of pregnancy. Rhythmic fetal heartbeat, germ and fetal movement can be seen in the sac. Can be diagnosed as early pregnancy, live birth.

Pregnancy sac

Increasing

After the fertilized egg is implanted, the endometrium changes rapidly. The decidua covers the fertilized egg and surrounds the fertilized egg between the uterine muscle and the endometrium, forming a closed cavity. The fertilized egg is in this relative position. The closed sac develops into a fetus, which is medically referred to as the pregnancy sac (pregnancy sac ). In the early stage of embryonic development, the amniotic membrane is closely related to embryo formation. The ultrasound-filled pregnancy sac is full of fluid, which is mainly chorionic fluid, representing the chorionic cavity. With the development of early pregnancy, the amniotic cavity expands to about 10 The chorionic cavity gradually disappeared around the week, and the amnion and the chorion merged.