Double bleb sign in USg are depictive of:
Double bleb sign : Visualization of gestational sac containing a yolk sac and amniotic sac giving an appearance of two small bubbles . Feature of an intrauterine pregnancy. Distinguishes a pregnancy from a pseudogestational sac or decidual cast cyst. Ref:Williams 24e pg 170.
Intrauterine two gestations sac
Amniotic sac and yolk sac
Ectopic pregnancy
Heterotopic pregnancy
General obstetrics