Hi! When I was preggers with DS#2 and DS#3 I had problems with antibody Titers. I had a couple of blood transfusions in between DS#1 and DS#2, almost 20 years ago, and when I got preggers with DS#2 they drew some blood and found out that way that I had 3 antibody titer numbers which they decided to keep an eye on. There wasn't a lot known then just that they needed to keep an eye on the numbers and if they went up fast or high then it was cause to worry. In my last month, about a week before the EDD my numbers jumped way high and it was decided to induce. DS#2 finally had to come with the help of a c-section and we were both taken to a bigger hospital 60 miles away just in case he needed a blood transfusion. He didn't need one, thankfully! Now he's a 5'9" 12 & 1/2 year old! With DS#3 the information was way better! My titer numbers were watched and DS#3 went 8 days past the EDD before he was induced. He was a healthy VBAC baby and got to stay at the hospital he was born at. I was nervous at the start of that pregnancy, but as it went on I relaxed more because the doctors knew more.
Hopefully this helps any mom-to-be that might be going through the same thing.
Peace!