Introduction
Ultrasound guided transvaginal oocyte retrieval for in vitro fertilization (IVF) is a very common procedurePropofol (2,6-diisopropylphenol) and fentanyl are commonly used agents in oocyte retrieval procedures. Propofol is used as continuous intravenous infusion or intermittent bolus injectionsAlthough propofol is widely used during oocyte retrieval, studies on its effects on fertilization are controversial. In vitro studies on mouse oocytesBIS monitoring systems provide an objective measure of a patient's depth of consciousnessOur hypothesis was that during the transvaginal oocyte retrieval procedure, the amount of propofol given as an infusion with BIS monitoring would be less compared to the amount used when bolus doses are given according to the clinical evaluation.