Endocrine Abstracts

Introduction: With IVF stimulation a premature pituitary LH surge can ruin the whole procedure. Traditionally prevention of this event is done by administering a GnRH antagonist against endogenous hypothalamic GnRH. The obvious consequence is low LH levels, one of the two gonadotrophines usually not given for ovarian stimulation since for adequate action FSH suffices. However there are indications that LH levels may render too low, in particular in older women. The aim of this...