Small gestational sac, slow hcg

Question

Hi all I am 6 wks 3 day preg today. My hcg levels were rising but not doubling previously. I did a scan at wk 5 and doc mention could see gestational sac but were smaller than expected. Another scan at wk 6 saw gestational sac(6mm) + yolk. The gestational sac measures 5wk 2 day old even though it was 6wk. Doc still say my gestational sac is too small. And is pessimistic about the situation saying I have less than 50 percent chance for a viable pregnancy. May I know if anyone has similar situation in the past with a sucessful pregnancy? Or anyone similar situation resulted in miscarriage?#pleasehelp #firstbaby #1stimemom  #ivf #ivfquestions #advicepls  #ivf #gestationalsac

EL W · Accepted Answer

Did gynae count your pregnancy from last menstrual period (LMP) or last ovulation? If it’s LMP, it’s well known to not be accurate measurement especially if you have irregular periods. Better if it’s calculated from last ovulation - if you track it diligently all these while then it is more precise measurement of the true gestational age.