hello,happy dog, I am pregnant about 10w,urine hcg(positive) but it doesnot see the heartbeat.So my oB send me to do blood test for Quantity hcg which was 6,400. OB told me that may indicate I was pregnant later than 10w. he let me take another blood HCG quantity, if hcg quantity is high like more 10,000, it is ok for my baby. does anyone have any experience or advise for me. I was miscarried once on DEC. 2005. please give some advice for me. thanks.