Selective oocyte retrieval: a new approach to ovarian hyperstimulation.

Selective oocyte retrieval is a new approach to ovarian hyperstimulation (OHS) that prevents side effects of OHS and multiple pregnancies by puncturing most of the ovarian follicles 35 hours after hCG administration as in an IVF program. The remaining intact follicles can still result in a singleton or twin pregnancy. In three patients who presented a multiple follicular development, this technique resulted in two pregnancies; moreover, the retrieved oocytes were fertilized and the embryos frozen.