Hello doctor. I am 8 weeks pregnant and did my first ultrasound. Everything is normal including the foods. A small fluid filled sac has been detected in the usg on the left end separated from the g sac of foods. Impression of the usg related to this sac is written as. Possibility of second g sac. Needs rescan after 2 weeks. Only fluid filled sac detected. Can you please tell me what is this another fluid filled sac? Is this any sign of complication? Is this dangerous for baby?