test is positive and no sac seen on USG, there are 2 possibilities.
One is that it is too early, so the sac is not seen on USG.
Second possibility is that she has pregnancy somewhere outside uterus
, that is in tubes, so not seen. This second possibility is serious one and needs to be ruled out for sure before taking the tablets for abortion
So, she can get blood test
for B hcg
levels done- 2 samples 48 hours apart and depending on the value and the increase, can plan next USG by TVS to confirm location of pregnancy.
hope this information is useful.
Dr. Mrs. Sumeet Baheti