Had IUI, 2 weeks later positive test with HcG of 150, 2 days later increase to 225, not as much as expected. 2 days later dropped to 80. Before the IUI was told 2, maybe 3 follicles were going to be ready and to expect a good chance of 2. Now 3 days after the 80 test, spot bleeding is occurring but Dr. does not seem to be too concerned, and has scheduled an appointment after 4 days when she expects the full period to be over so they can run an anti-coag panel, as this is believed to be my 2nd miscarriage (non-confirmed but probable). As I have not actually miscarried yet, how can they be so certain that I am going to lose the baby? Is there any chance it will be okay? Also, since there was a strong chance of multiple births, what are the possibilities that one of the 2, possibly 3 is causing this? And if it is a "vanishing twin syndrome" how possible there could be damage to the remaining child(ren)? Going through other posts on this forum, I read that one lady (at least) had 3 miscarriages and discusses an abnormal bald spot on the back of the head. This is occurring with me as well, and never would have even considered the 2 related until after reading that. Could a thyroid condition cause this to occur? And wouldn't a thyroid imbalance have showed up in all the tests we took for infertility before we chose IUI? Any answers, suggestions, advice or direction would be greatly appreciated. Thanks..