I have 43 days menstrual cycle my lmp was on 5th july 2012 i tested for blood hcg on 20th aug 2012 it was 4057 9 then after 10 days on 30th aug 2012 again i tested for blood hcg n it was 17436 4 i am worried coz i guess little low as compare to normal lev

Ultrasound: The serum HCG levels double in early pregnancy every 60 hours. Of course, nothing is exact, but an ultrasound should allay the fears that you're experiencing.

It plateaus: But it's now january, 5 months later. If ur pregnancy is fine i would not ge immersing myself in what your serum bhcg's did back then. I hope your pregnancy is doing well, consider focusing on more practical matters, please.