Girls, hello? Please share your experience about cysts in the ovaries …

Girls, hello? Please share your experience about cysts in the ovaries during pregnancy. Before pregnancy, it wasn't there, all ultrasounds until 34 weeks also didn't show it, today on ultrasound (34 week) they found a cyst measuring 7 cm. But it doesn't bother me, no pain in this area. Maybe someone had it like that, is it dangerous? The gynecologist says just observe, maybe after natural birth it will go away by itself, and if not, then they will remove it immediately. Does it affect reproductive function? Thanks in advance for the answers?