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Greetings of the day
Before you go for any procedure, i would suggest you to get a tranvaginal Ultrasound done. It is more sensitive than abdominal ultrasound in picking up the gestational sac
Even at 6 weeks gestational sac is not seen by transvaginal ultrasound
its unlikely that pregnancy
In case you need any further assistance, will be glad to assist you.
Wishing you happy and healthy life
Dr Deepak K K