Ay, hindi ko naman naririnig yan dati, mama! This sounds like something your OB mentioned during your ultrasound, kaya best talaga na tanungin mo directly siya ano exactly ang meaning at kung may follow-up needed, kasi yan ang makakabigy ng proper guidance based sa iyong specific situation. A few of us mums nag-worry din ng ganito with prenatal findings, but ang best approach talaga is to ask your doctor para hindi ka mag-stress ng walang basis, usually pag may findings ang sonologist, may explanation din siya kung concerning o normal lang.