Hi, this is my 11th ivf cycle (history of thin lining)and my results have been up and down from the start. My HCG levels were very slow to rises at the start but then did what they should have been doing; 10/6 =28, 12/6= 29, 15/6=57, 18/6=200, 20/6=585, 23/6=1797 and 1/7=13000. I had a scan 23/6 which showed 3mm gestational sac and another scan yesterday 1/7 which showed and empty 9mm gestational sac. My dates (transfer 5 day blast 30/5) make no sense in regards to my HCG levels and I seem behind on everything so I m unsure west to think- about everything. Do you think this is an anembryonic pregnancy?