Hello! I was on 50mg of clomid and went for my first u/s a week ago. They saw two sacs but said only one would make it. I went back today to see if the second sac was gone. It wasn't and they said that there are identical twins in it! So now I have one frat. and two identical twins. They did say they weren't sure if the twins split because the u/s machine couldn't see it. I see a special doctor in one week. One question is what does it mean to "split"? Also don't identical twins share a sac? So even if you're pregnant with 3, one frat and two identical, you would only see 2 sacs correct?