Hey..my M/C was 11-12-08, and my hCG was back down to -1 exactly a week later. So i was in the clear to have intercourse. But they recommended not "trying' till I got AF. WELL....I got pregnant again, and it ended in a MC 12-12-08. Both of which were natural miscarriages, and I am just now getting AF. Soo...I hope that helps.please..wait till your levels are back to 5 or lower, and wait to get AF. If not your just putting yourself at risk for another MC..and the more MC's you have the more the higher risk you are.GOOD LUCK