Thanks for your query.
is definitely classified as a failed pregnancy, if the gestational sac
exceeds a diameter of 18 - 20 mm, on transvaginal ultrasound
, without identification of a yolk sac
and a fetal pole
Also, if the fetus is > 7mm, but there is no heartbeat seen.
Normally, by 6 weeks, a fetal pole should be seen, and by 7 weeks, a heartbeat is definitely visualized.
Please remember that these findings are based on a reliable, expert ultrasound.
Variation of a few days is normal.
So you need to give me the exact measurements in ultrasound, for me to be reasonably sure, that the fetus is dead or non viable.