So this is my first twin pregnancy and I have four other children. I have never made it to 40 weeks, my last child I was 37w1d. With twins, I was thinking it would be 37 weeks, but is that right? I'm so Type A and need to plan as much as I can, while knowing it can all change in an instant. So when does your OB say, you can expect delivery (I'm looking to do vaginal)?