I had an u/s today due to spotting. Bub measured 5wk5d and HR of 105. And the u/s lady was talking to the other lady in there- and said look there's a small peri sac. I'm thinking WTF a peri sac! any one going to tell me, then the other lady said (she was also pregnant) thats always been my fear to have one of those.
So if anyone can shed some light on what a peri sac is, because unfortunately they didn't think to explain that to me. I have a feeling it's to do with my spotting.

