Two successful pregnancies achieved by converting an in vitro fertilization cycle to an intrauterine insemination cycle in five cases with documented premature ovulation.

We here report two successful pregnancies obtained by converting an in vitro fertilization (IVF) cycle to an intrauterine insemination (IUI) cycle in five poor responder patients whose oocyte pick-up (OPU) procedures were canceled due to documented premature ovulation immediately before OPU. To our knowledge, this is the first article that demonstrates that switching an IVF cycle to an IUI cycle when premature ovulation occurs on the day of OPU can produce successful pregnancies, even in poor responder patients.