Is the size of the gestational sac in early pregnancy related to men and women? The size of the gestational sac in early pregnancy has a great impact on fetal development. Different sizes of gestational sacs may mean different gestational ages and embryonic development status. However, there is still some controversy as to whether the size of the gestational sac is related to men and women. This article will elaborate on several aspects such as gestational sac size, gender identification, embryo development and pregnancy care. 1. The impact of gestational sac size on fetal development Large gestational sac