So I had my 6 week scan today. We got to hear the heartbeat and it was really strong. Baby was measuring at 7 mm and the hearbeat was 144. I'm supposed to be 6 weeks 3 days but baby is developing at 6 weeks 5 days. Then the doctor found baby "b" which we weren't expecting. Initial reponse was holy crap! Twins! My husband almost fell out of the chair. Unfortuately the doctor immediately told us that this is going to be a vanishing twin. Baby "b" is not developing properly. It's measuring only 3 mm and heartbeat was 86 which puts it at 6 weeks. He said when I return in a week and a half it should no longer be visible. We heard the hearbeat and it was really sad, very slow. I started crying in front of the doctor. We weren't prepared for twins and the thought of having them scares me, but knowing that I'm going to lose one is really sad. I'm still very blesssed that baby A is doing great with a nice healthy strong heartbeat. Doctor said that it shouldn't be affected by baby B. He said I might experience some bleeding which is normal. Has anyone else ever dealt with this and gone on to have a perfect, healthy baby? thanks!