ABSTRACT
In an IVM cycle, the physiologic periovulatory hormonal and endometrial changes of a natural cycle are missing at the time of oocyte retrieval. Adequate endometrial proliferation has to be achieved in just 2 days before the start of progesterone administration in order to open the window of implantation for the embryo. Basically, identical protocols for endometrial preparation have been used both in women with regular cycles and normal appearing ovaries and in women with polycystic ovaries with or without follicular phase priming with FSH or hCG34-36,42.
