Cysts & BloodLakes ??

Has Anybody Ever Heard If Cysts Or BloodLakes In The Placenta ? I Recieved A Call From My Dr Today To Go Over My Anatomy Scan / Ultrasound & He Said Everything Looked Normal Except These 2 Things .. He Also Said HeTalked To A Maternal Fetal Specialist & They Said ItsNothing To Worry About Because Theyre Small ! But Im Still Kind Of Worried For The Simple Fact I Never Had That With Either One Of My Boys But Now Im Having My Girl And This Happens ?! Im Trying Not To Stress About It But It Is Kind Of Bothering Me !! 😳😕😩

Also Is There A Specific Reason This Can Happen ??