Decidual space is obliterated by:
10 th week
12 th week
18 that week
16 th week
Decidual space is the space between decidua capsularis and parietalis seen in early pregnancy because the gestational sac does not fill the uterine cavity. By 14-16 weeks the gestational sacred has enlarged to fill the uterine cavity completely by 4 th month (16 weeks). Ref: Datta Observe 9e pg 22.
General obstetrics