I would like to find out ways in which I can maximize my ability to have a successful FET. I have had four (4) transfers with untested embryos and none of them implanted. I recently did a retrieval and I have 4 day 5 embryos, which were sent for testing. Two came back normal and the others are low mosaics. I was slated to do a transfer this month, May 12 but it was canceled because of thin lining.