That level of B subunit HCG won’t be enough to confirm a possible twin pregnancy. The best way to rule out this possibilility is to have an ultrasound to watch if there are 2 gestational sacs. I would suggest you to have an ultrasound within the next couple of weeks if you urge to confirm this. An experimented physician could observe this as early as 5-6 weeks. I hope I cleared your doubt.
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