Maryz I had a large cyst on my left ovary in both my pregnancies and had no complications just discomfort but that stopped both times as I progressed in the pregnancy I guess it burst or went down as I didn't have anymore scans after my 18 week scans to check it my Dr said it was a pregnancy cyst and nothing to worry about just some women are prone to getting them. I also had 8 cysts the size of dinner plates after my first round of IVF and had OHSS and FS was not concerned about them affecting the pregnancy unfortunately at my 8 week scan it was found to be a blighted ovum I now feel around to find a cyst to see if I'm pregnant as it's my first indicator !!!
Rice great news about ur scan I bet ur over the moon!
Best wishes to all