Is hcg not doubling in 5 days a sign of a miscarriage? 5-6 weeks pregnant. hcg-910/5 days later hcg-1,300

Might be: Can represent the possibility of early pregnancy problem such as miscarriage or the more concerning ectopic pregnancy. Needs further urgent doctor assesmsent particularly if abdominal pain. May need followup bloods and scans to sort it out. Please see doctor.

Yes: This should be correlated with ultrasound and perhaps progesterone levels, but this does not suggest a normal pregnancy. Doubling usually occurs in 2 to 3 days, so your level should be 3000 or better.