HCG usually doubles every 48-72 hours. That usually corresponds to HCG levels below 1200 IU. From 1200-6000, the HCG usually takes 72-96 hours to double. Above 6000 IU, the hCG often takes over four days to double. So, the rate of increase in HCG levels normally varies as a pregnancy progresses. Normal HCG values vary up to 20 times between different pregnancies, however, and an HCG that does not double every two to three days does not necessarily indicate a problem with the pregnancy. Some normal pregnancies will have quite low levels of HCG, and result in perfect babies.
3 weeks LMP: 5 - 50 mIU/ml 4 weeks LMP: 5 - 426 mIU/ml 5 weeks LMP: 18 - 7,340 mIU/ml 6 weeks LMP: 1,080 - 56,500 mIU/ml 7 - 8 weeks LMP: 7, 650 - 229,000 mIU/ml 9 - 12 weeks LMP: 25,700 - 288,000 mIU/ml 13 - 16 weeks LMP: 13,300 - 254,000 mIU/ml 17 - 24 weeks LMP: 4,060 - 165,400 mIU/ml 25 - 40 weeks LMP: 3,640 - 117,000 mIU/ml Non-pregnant females: <5.0 mIU/ml Postmenopausal females: <9.5 mIU/ml
i really dont know but after some time the numbers dont double they just increase.
i had one at 6 weeks 3 days and it was on 52,296 and another one at 6 weeks 6 days and it was at 65,201 ( so it did not double)
im currently 20 weeks and everything is going great.
at least your numbers are increasing, i dont think their bad.
sorry i could not help you more.
i hope your numbers keep increasing and the ultrasound goes well
Good luck