Simple cyst is dangerous?or not

I have bilateral endometriocyst prior of getting pregnant, benign sya, monitoring lang pero walang naging epekto sa pagbubuntis and as per my OB it will only be dangerous if active rin cyst mo in a way na lumalaki rin sya while lumalaki ung baby sa tummy sa case ko kasi nagshrink sya last tvs ko from 4cm naging 2cm nalang sya right now I don’t know na kasi hindi naman nakikit sa pelvic ultrasound un through TVS lang talaga.