Hi, welcome to HCM.
Anteverted uterus is normal finding , it is position of uterus behind urinary bladder
. There is pregnancy in uterine which is confirmed by gestational sac
. However there is no foetal pole means foetal part identified.
It may happens in either missed abortion
or blightened ovum( pregnancy in which foetus doesn't form) . You need to do follow up ultrasonography
after 2 weeks for confirmation of viability.
Hope I have answered your query.