HELP hcg levels rising but not doubling

Ivana

I'm currently 6 weeks 2 days pregnant. I had bloodwork at 5 weeks 4 days and it was 10,000. I got bloodwork again at 6 weeks 1 day and it was 24,000. Doctor wants to meet with me tomorrow. Is something wrong with my baby? Does hcg need to double every 48 hours in order to have a healthy baby? I just want to prepare myself for the doctor visit tomorrow.