<prompt> Double bleb sign in USg are depictive of:Intrauterine two gestations sacAmniotic sac and yolk sacEctopic pregnancyHeterotopic pregnancy  <response>: 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. 