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[Ovarian stimulation with pure FSH in an in vitro fertilization program].

The therapeutic efficacy of stimulating ovarian follicular development by pure urinary FSH in an IVF programme was determined and compared with results of other therapeutic regimes. 43 patients selected for extracorporeal fertilization were treated with pure FSH after stimulation with clomiphene or HMG had proven not be successful. Only in 5 patients (12%) treatment had to be discontinued before follicular puncture. In 32 women an embryo transfer was performed, and 7 patients conceived. This result demonstrates that, applying pure FSH stimulation, favourable conditions can be created for an in-vitro fertilization in patients with impaired follicular maturation following conventional stimulation with clomiphene or HMG. On the strength of the values determined for progesterone and estradiol during the luteal phase one has to conclude that a normal corpus luteum function was achieved in all our patients following FSH-stimulation.