Difference Between Gestational Sac and Yolk Sac (With Table)

The gestational sac and yolk sac are two embryo-carrying sac-like structures filled with fluids that help in the maintenance of pregnancy and nourish the growing embryo. Both of them help in the growth and development of the fetus giving rise to a fully mature baby.

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Gestational Sac vs. Yolk Sac

The main difference between the gestational sac and yolk sac is that the gestational sac is the prior occurring sac that eventually develops to hold the yolk sac. There is a juncture in the gestational period when both the sacs exist together.