at 6 weeks i had 2 sacs, now at 8 weeks its noly one.

[Ladybug3082]

I went to the hosoital with obdominal pain. Doctor found that I was 6 weeks pregnant. Mu u/s found that I had 2 sacs and one fetal pole. Yesterday (8 weeks) I got another u/s, the doctor only found 1 sac and 1 fetal pole. What happened to the other one? Could they have comnbined? the baby is in a weird position, like its at the top of the sac, instead of the bottom. We could barely see the bottom, is it possible that the other baby is at the bottom, but is still too small to see?

[AnnieBrooke]

It sounds like you have had a "vanishing twin."  Until the advent of early ultrasounds they did not know this, but now it is believed that as many as 10% of all pregnancies begin with multiples, and all but one fade away, leaving you with one.  They would not have combined, don't worry about that.  (That is a phenomenon only of identical twins no later than 12 days after conception.  It doesn't happen with fraternals -- i.e., each in its own sac -- and does not happen so late.)  It is not likely that by 8 weeks another sac or baby is there but too small to see, even at 6 weeks you only had one visible baby in the two sacs.  Now that the sac is gone, you do just have one baby.  I am sorry if this dashes your hopes for twins, I know it can be like going to a birthday party and a funeral in the same room.  But you are still pregnant and that is good.

[tarrah87]

i'm not sure but more than likely it's no longer there; although i was pregnant with twins and my first 3 ob visits only saw one baby and one fetal pole, my 4th visit they found both babies. so only your doctor could tell you.