ABSTRACT
Later Cha et al.7 reported a pregnancy rate of 27.1%. However this high pregnancy rate was obtained after transfer of an average 6.3 embryos per patient, and the implantation rate was still low (6.9%). To compensate for this, endogenous priming with FSH8,9 or hCG10,11 has been suggested before immature oocyte retrieval and subsequent IVM.
