Hi, I'm a bit late to the party. I gave the dubious honour of having had Grade 4 placenta praevia (totally covered) twice.
I knew 3 people before me with PP, who had no complications, just an ELCS. Unfortunately I had unstable PP which meant numerous small bleeds.
With DD1 (DC2) I was find until 33.5 weeks, big bleed, stayed in until ELCS at 37.5 weeks. I had lots if small bleeds, about a day apart, but never long enough between to go home.
With DD2, I was admitted at 24 weeks, 26, three times at 31 weeks, then a final admission at 33 weeks. I had a CS booked for 37 weeks, but ended il with EMCS at 36+1
Both times baby was gone, in fact, DD1 was 8lb 11oz at 37.5 weeks, I was glad she didn't go full term! DD2 was a very petite 5lb 13oz, but after 10 minutes in a warmer after being born, she was fine.
I'm happy to answer any questions.