How does implantation in frozen embryos occur?

When we talk about embryo transfer and embryo transfer of frozen embryos we don't refer to the transfer of frozen embryos but to the process of embryo transfer after being frozen and thawn. So, once in the uterus, implantation happens exactly the same way, regardless of whether the embryos have been created in the same cycle or if they come from previous cycles and, therefore, have bean frozen for a certain period of time.