but I had great success with Del estrogen injections for my mock cycle, and I have seen that a lot of women on this board have. I have just begun a real cycle, so will be using Del estrogen in about a week, so I don't know what the result will be for my uterus this time around. Does your clinic ever use Del estrogen. I don't know if it would be wise to switch (I assume you are using the meds you are because the clinic believes they will work the best for you) at this point or if there is even time since the injection is only administered every 3 days. This might not have been helpful at all, but I know since we all want to have the best shot at a successful transfer, it's sometimes good to just be armed with as much info as possible, and to ask questions of your RE so she/he can figure out what is best for you.