How is the lower margin of the placenta covering the internal os of the cervix caused?

Patient's question:

No

Doctor's answer:

Don't worry for now, we're just waiting and seeing. In two months, we'll check if there are any further abnormalities in the placenta. If it remains in its current state, there's no problem. Otherwise, it may lead to premature birth or miscarriage. Wishing you and your baby good health.