Hi! I had my ultrasound last May 31 and it was my 21st week. My placenta was high lying, posterior grade 1. Yesterday, I had another scan and now my placenta has moved to lateral, grade 3, high lying. Is this possible that placenta changes in a span of 8 weeks? Also, within the 8 weeks, my sugar was okay, my BP is also okay. I don t smoke or drink alcoholic beverages. Please advise. Thank you.