ABSTRACT
INTRODUCTION Historically, monitoring of ovarian response by means of measuring ovarian hormones came into use for ovulation induction due to the complications of gonadotropin therapy, such as multiple births and ovarian hyperstimulation syndrome (OHSS). In ovulation induction cycles with gonadotropins, Klopper and coworkers showed that success and complication rates were not dependent on monitoring as such, but on the treatment protocol used. Monitoring merely gives us the possibility to decide how far we want to go (1). is may be true for ovulation induction cycles, but not for assisted reproduction technology (ART; i.e., in vitro fertilization [IVF] and intracytoplasmic sperm injection) cycles, where the number of transferred embryos has to be restricted, thereby minimizing the risk for multiple births as well as OHSS.
