Placenta Covers OS - 18 Weeks Pregnant

Jane Foley's picture


Dear Ms. Ultrasound,
Hi, I had bleeding and strong BH contractions after intercourse with my partner which lasted for 2 days. I'm 18 weeks pregnant.

My scan says this..

The placenta lies mainly on the left lateral wall, however it covers the internal os. No obvious hemorrhage seen.

As my placenta covers the os, what are the chances of it moving by the time I am 38 weeks? I know that 90% of LLP move enough for a normal birth, however as mine covers the internal os are the chances still as high?

Can I still have sex? Do I need to be careful? I work in a hospital (Labour ward receptionist) So I am constantly on my feet fetching notes which can be quite heavy!! I also have an 18 month old son I am terrified I'm going to hemorrhage outside of hospital - I have already had bleeding which is coming from the placenta however has calmed down at the moment.

I'm so scared and not seeing my consultant until I'm 21.5 weeks and this is all I can think about!!

Please help advise me.

Thank you.


It is somewhat worrisome that you have been diagnosed with a complete placenta previa and are still at work. Although I am not an OB/GYN, I do know that most doctors recommend eliminating most activity and some will require bed rest. I would take it easy. No heavy lifting including your child. Please contact your doctor and ask for instruction now. I would hope that the doctor would advise you over the phone after reading the results of the ultrasound.

You are right with the information you have gathered. Many placentas which are low or complete at 18 weeks will grow away from the cervical os, allowing a normal delivery. For now a complete placenta previa can be a dangerous finding so I really would take it easy!

With Regards,
-- Jane RDMS