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How many weeks pregnant am I likely to be with a gestation sac of 7mm?

I am trying to find out how many weeks pregnant i am likely to be if i have a gestation sac of 7mm, i have just been for a scan an they were not very helpful and told me to come back in 2 weeks. Please can you give me some idea?

Sarah...
Answer: Hi, It is best to try to remember your dates as this is more reliable for now. You must be very early 5 – 7 weeks. Best wishes, Alex
Answered: 15 Jun 2008